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Repair · Glendale

Furnace Control Board Replacement in Glendale — January 2025

CompletedJanuary 20, 2025
TechnicianGarrett
Service AreaGlendale
Visit Invoice Total$1,107.60
Call (602) 613-3489
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Documented ServiceFindings supported by service notes
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AZ Perfect Comfort — Our Work
Findings & Work Performed

What Garrett documented during the visit

Failed control board

Replaced the system's failed control board.

The Verification

Verification performed

Furnace was cycled to verify normal operation.

— Related Services

How this repair fits into our Phoenix HVAC service

This repair is one example of the Heating Repair work AZ Perfect Comfort performs across Glendale, AZ. You can browse every case study we have published for this type of work in the Furnace Control Board Replacement case studies archive. Homeowners who join our Comfort Club maintenance membership get every eligible repair backed by our Lifetime Repair Guarantee. For larger repairs and replacements, financing options are available for qualifying projects.

— Parts & Work Performed

Exactly what was installed

ItemDescriptionQtyPrice
Replace manufacturer-specific control board that controls furnace operations. Call office for price and availability. 1 $1,132.80
Diamond Tier 3 System Perfect Comfort Club Membership: two maintenance visits per year, 26-point checkup, 20% repair discount, no overtime charges, priority service, 50% off service call fee, evaporat 1 $74.75
Maintenance visit credit. 1 $-448.50
Diamond Level 3-system heating maintenance. 1 $448.50
Service call charge waived with paid repair or service during business hours. 1 $-99.95
Total: $1,107.60
— Photo Documentation

93 photos from this repair

Every step of this repair was documented on-site by Garrett.

Electrical compartment of an outdoor condenser showing capacitors, contactor, control board, and multiple connected wires and wire nuts.
Electrical compartment of an outdoor condenser showing capacitors, contactor, control board, and multiple connected wires and wire nuts.
Outdoor condenser control compartment showing wiring, contactor, two cylindrical capacitors including one with red wires, and a labeled hard-start kit canister.
Outdoor condenser control compartment showing wiring, contactor, two cylindrical capacitors including one with red wires, and a labeled hard-start kit canister.
HVAC control board mounted on the blower housing with multiple connected wires and illuminated status LEDs.
HVAC control board mounted on the blower housing with multiple connected wires and illuminated status LEDs.
Attic-installed furnace with metal vent pipe, insulated flex duct connections, condensate drain trap, service disconnect, and surrounding blown-in insulation visible.
Attic-installed furnace with metal vent pipe, insulated flex duct connections, condensate drain trap, service disconnect, and surrounding blown-in insulation visible.
Draft inducer motor assembly inside a furnace, showing wiring connections, ground lead, rubber mounts, and blower wheel.
Draft inducer motor assembly inside a furnace, showing wiring connections, ground lead, rubber mounts, and blower wheel.
Diagnostic instrument display shows 73.5 °F.
Diagnostic instrument display shows 73.5 °F.
Furnace control compartment with wiring, gas valve, ignition components, and an electrical junction box with warning label.
Furnace control compartment with wiring, gas valve, ignition components, and an electrical junction box with warning label.
Galvanized supply plenum above the air handler, seams sealed with mastic and foil tape, foam pipe insulation on top.
Galvanized supply plenum above the air handler, seams sealed with mastic and foil tape, foam pipe insulation on top.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Insulated refrigerant lines wrapped with tape run from the outdoor condenser into the wall.
Insulated refrigerant lines wrapped with tape run from the outdoor condenser into the wall.
Outdoor condenser control compartment open, showing dual-run capacitor, separate capacitor with red leads, contactor, and wiring.
Outdoor condenser control compartment open, showing dual-run capacitor, separate capacitor with red leads, contactor, and wiring.
Wall-mounted thermostat with circular faceplate, screen illuminated and showing 70 with a smaller 74 indicator beneath.
Wall-mounted thermostat with circular faceplate, screen illuminated and showing 70 with a smaller 74 indicator beneath.
Furnace and evaporator cabinet showing PVC condensate drain, insulated refrigerant line, gas valve, and inducer motor assembly.
Furnace and evaporator cabinet showing PVC condensate drain, insulated refrigerant line, gas valve, and inducer motor assembly.
Diagnostic instrument display shows 6.2 μF.
Diagnostic instrument display shows 6.2 μF.
Blower compartment control board mounted on metal housing with DIP switches, terminal strip, relays, and connected low-voltage wiring.
Blower compartment control board mounted on metal housing with DIP switches, terminal strip, relays, and connected low-voltage wiring.
Furnace control board mounted on blower housing with multiple connected wires, terminal strip, and DIP switches.
Furnace control board mounted on blower housing with multiple connected wires, terminal strip, and DIP switches.
Furnace control board mounted in the blower compartment with multiple low-voltage and line-voltage wires connected and status LEDs illuminated.
Furnace control board mounted in the blower compartment with multiple low-voltage and line-voltage wires connected and status LEDs illuminated.
Electrical spade connectors and wiring on a small motor with a rotation-labeled wheel inside the furnace cabinet.
Electrical spade connectors and wiring on a small motor with a rotation-labeled wheel inside the furnace cabinet.
Gas furnace burner compartment shows blue flames at the heat exchanger with dusty burner tubes and manifold.
Gas furnace burner compartment shows blue flames at the heat exchanger with dusty burner tubes and manifold.
Flexible insulated duct connects to a sheet metal plenum near the air handler above a rusted drain pan.
Flexible insulated duct connects to a sheet metal plenum near the air handler above a rusted drain pan.
Technician holds a furnace flame sensor removed from the burner compartment, with wiring and control components visible nearby.
Technician holds a furnace flame sensor removed from the burner compartment, with wiring and control components visible nearby.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Foil-taped duct plenum above an indoor air handler, with a round metal duct on the left.
Foil-taped duct plenum above an indoor air handler, with a round metal duct on the left.
Blower housing and wheel with attached control module cover and multicolored wiring harness inside the air handler.
Blower housing and wheel with attached control module cover and multicolored wiring harness inside the air handler.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Closet-installed forced-air furnace with metal flue vent, evaporator coil cabinet, insulated refrigerant line, condensate drain, and service labels on the door.
Closet-installed forced-air furnace with metal flue vent, evaporator coil cabinet, insulated refrigerant line, condensate drain, and service labels on the door.
Flame sensor with red spade connector mounted in front of gas furnace burners.
Flame sensor with red spade connector mounted in front of gas furnace burners.
Cylindrical metal run capacitor mounted on the blower housing, with connected wires and visible dust on the surface.
Cylindrical metal run capacitor mounted on the blower housing, with connected wires and visible dust on the surface.
Diagnostic instrument display shows 72.5 °F.
Diagnostic instrument display shows 72.5 °F.
Side of indoor air handler beside framing, showing PVC condensate drain with tee, elbow, and cleanout.
Side of indoor air handler beside framing, showing PVC condensate drain with tee, elbow, and cleanout.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Indoor furnace/air handler blower assembly with metal housing, visible blower wheel, electrical control module cover, and multiple color-coded wiring harnesses.
Indoor furnace/air handler blower assembly with metal housing, visible blower wheel, electrical control module cover, and multiple color-coded wiring harnesses.
Wall-mounted thermostat displays a 70° setpoint with 74° indoor temperature, installed on a textured wall.
Wall-mounted thermostat displays a 70° setpoint with 74° indoor temperature, installed on a textured wall.
Outlet box with a power cord plugged in, mounted on a joist beside attic ductwork and insulation.
Outlet box with a power cord plugged in, mounted on a joist beside attic ductwork and insulation.
Furnace compartment shows two pressure switches with connected wiring and a gray electrical box above a rust-colored drain pan.
Furnace compartment shows two pressure switches with connected wiring and a gray electrical box above a rust-colored drain pan.
Two furnace pressure switches with rubber tubing and wired terminals mounted near the draft inducer assembly.
Two furnace pressure switches with rubber tubing and wired terminals mounted near the draft inducer assembly.
Close-up of an HVAC blower wheel showing accumulated dust on the fins inside the housing.
Close-up of an HVAC blower wheel showing accumulated dust on the fins inside the housing.
Gas furnace burner compartment with blue flames at two burners and a glowing igniter.
Gas furnace burner compartment with blue flames at two burners and a glowing igniter.
Wall-mounted digital thermostat displays 72 with temperature label and arrow buttons beneath the screen.
Wall-mounted digital thermostat displays 72 with temperature label and arrow buttons beneath the screen.
Centrifugal blower wheel inside the air handler housing, showing straight fins and a small balancing clip on one blade.
Centrifugal blower wheel inside the air handler housing, showing straight fins and a small balancing clip on one blade.
Flame sensor mounted at the burner assembly with white lead connected and surrounding metal housing.
Flame sensor mounted at the burner assembly with white lead connected and surrounding metal housing.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Pleated HVAC air filter held in front of an air handler cabinet with warning labels visible.
Pleated HVAC air filter held in front of an air handler cabinet with warning labels visible.
Air filter package edge shows size marking 20 x 20 x 1 inches, held above a workshop floor.
Air filter package edge shows size marking 20 x 20 x 1 inches, held above a workshop floor.
Indoor air handler on a stand with return grille above, insulated refrigerant line, and PVC condensate drain.
Indoor air handler on a stand with return grille above, insulated refrigerant line, and PVC condensate drain.
Insulated flex duct connected to a metal plenum at an attic air handler above a drain pan.
Insulated flex duct connected to a metal plenum at an attic air handler above a drain pan.
Gas furnace burners lit with blue flames in the burner compartment, with a glowing igniter visible at the top burner.
Gas furnace burners lit with blue flames in the burner compartment, with a glowing igniter visible at the top burner.
Indoor air handler cabinet with sheet metal transition and foil-taped seams below a large return air grille.
Indoor air handler cabinet with sheet metal transition and foil-taped seams below a large return air grille.
Diagnostic instrument display shows 0.6 A.
Diagnostic instrument display shows 0.6 A.
Diagnostic instrument display shows 0.77 A.
Diagnostic instrument display shows 0.77 A.
Diagnostic instrument display shows 9.6 µF.
Diagnostic instrument display shows 9.6 µF.
Flame sensor removed from a gas furnace, showing porcelain insulator, spade connector, and L-shaped rod.
Flame sensor removed from a gas furnace, showing porcelain insulator, spade connector, and L-shaped rod.
Blower motor and mounting bracket with multicolor wiring harness routed across the housing inside the air handler compartment.
Blower motor and mounting bracket with multicolor wiring harness routed across the housing inside the air handler compartment.
A-frame evaporator coil inside the air handler, showing clean aluminum fins and surrounding sheet-metal plenum.
A-frame evaporator coil inside the air handler, showing clean aluminum fins and surrounding sheet-metal plenum.
Replacement control board sealed in an antistatic bag inside a cardboard box during service visit.
Replacement control board sealed in an antistatic bag inside a cardboard box during service visit.
HVAC control circuit board packaged in an antistatic bag inside a cardboard box, with connectors and components visible.
HVAC control circuit board packaged in an antistatic bag inside a cardboard box, with connectors and components visible.
Close-up inside a furnace shows a black rotating wheel, two spade-connected switch terminals, and surrounding wiring and metal housing.
Close-up inside a furnace shows a black rotating wheel, two spade-connected switch terminals, and surrounding wiring and metal housing.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Draft inducer assembly inside the furnace cabinet with connected wiring and terminals visible near a yellow component label.
Draft inducer assembly inside the furnace cabinet with connected wiring and terminals visible near a yellow component label.
HVAC cabinet side panel with concentric knockouts and an electrical cable routed through one opening, foil-taped duct transition above.
HVAC cabinet side panel with concentric knockouts and an electrical cable routed through one opening, foil-taped duct transition above.
Outdoor condenser unit beside house with insulated refrigerant lines and wall-mounted disconnect visible.
Outdoor condenser unit beside house with insulated refrigerant lines and wall-mounted disconnect visible.
Metal run capacitor and wiring inside outdoor condenser compartment; orange wire with an unconnected spade terminal.
Metal run capacitor and wiring inside outdoor condenser compartment; orange wire with an unconnected spade terminal.
Smart thermostat on interior wall shows 70 degrees setpoint with 74 degrees indicated below.
Smart thermostat on interior wall shows 70 degrees setpoint with 74 degrees indicated below.
Furnace cabinet installed in an attic, suspended by chains, with metal vent connection and labeled access panels closed.
Furnace cabinet installed in an attic, suspended by chains, with metal vent connection and labeled access panels closed.
Wall-mounted smart thermostat displays 74 degrees with heating set to 73 and cooling set to 80.
Wall-mounted smart thermostat displays 74 degrees with heating set to 73 and cooling set to 80.
Flame sensor with porcelain insulator held by a technician, showing the L-shaped sensing rod and mounting bracket.
Flame sensor with porcelain insulator held by a technician, showing the L-shaped sensing rod and mounting bracket.
Wall-mounted thermostat with open cover and digital display reading 72, with system and fan slider switches visible.
Wall-mounted thermostat with open cover and digital display reading 72, with system and fan slider switches visible.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Furnace control board mounted on the blower housing with multiple connected wires, DIP switches, terminal strip, and a bonded ground.
Furnace control board mounted on the blower housing with multiple connected wires, DIP switches, terminal strip, and a bonded ground.
Sheet-metal transition duct connected to insulated flexible duct at attic air handler, with exposed fiberglass insulation.
Sheet-metal transition duct connected to insulated flexible duct at attic air handler, with exposed fiberglass insulation.
Diagnostic instrument display shows 50 °F.
Diagnostic instrument display shows 50 °F.
Pleated rectangular HVAC air filter with cardboard frame, held by a hand inside a residential room.
Pleated rectangular HVAC air filter with cardboard frame, held by a hand inside a residential room.
Disposable HVAC air filter edge shows printed size 20 x 30 x 1.
Disposable HVAC air filter edge shows printed size 20 x 30 x 1.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Contactor inside the outdoor unit with multiple connected wires, adjacent metal can capacitor and surrounding control components.
Contactor inside the outdoor unit with multiple connected wires, adjacent metal can capacitor and surrounding control components.
Condenser unit control compartment open, showing run capacitors, contactor, control board, and connected wiring inside the outdoor unit.
Condenser unit control compartment open, showing run capacitors, contactor, control board, and connected wiring inside the outdoor unit.
Flame sensor rod with ceramic insulator and mounting bracket resting on a work sleeve.
Flame sensor rod with ceramic insulator and mounting bracket resting on a work sleeve.
Dual-run capacitor labeled 35 + 7.5 μF ±6% 440VAC, installed in the condenser cabinet with wiring connected and mounting strap.
Dual-run capacitor labeled 35 + 7.5 μF ±6% 440VAC, installed in the condenser cabinet with wiring connected and mounting strap.
Single run capacitor labeled 5.0 μF 440VAC with two wires connected to spade terminals inside the condenser unit.
Single run capacitor labeled 5.0 μF 440VAC with two wires connected to spade terminals inside the condenser unit.
Electrical compartment showing a capacitor labeled 5.0 μF, a hard-start device, connected wiring, and control board.
Electrical compartment showing a capacitor labeled 5.0 μF, a hard-start device, connected wiring, and control board.
Pleated HVAC air filter labeled 20x20x1 sits beside an insulated refrigerant line near the indoor unit.
Pleated HVAC air filter labeled 20x20x1 sits beside an insulated refrigerant line near the indoor unit.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Close-up of a centrifugal blower wheel and adjacent motor housing with a green ground wire visible inside the HVAC assembly.
Close-up of a centrifugal blower wheel and adjacent motor housing with a green ground wire visible inside the HVAC assembly.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Diagnostic instrument display shows 5.2 μF.
Diagnostic instrument display shows 5.2 μF.
Contactor with multiple colored wires connected at screw terminals inside outdoor condenser compartment, adjacent to a cylindrical run capacitor.
Contactor with multiple colored wires connected at screw terminals inside outdoor condenser compartment, adjacent to a cylindrical run capacitor.
HVAC diagnostic instrument photographed during the service visit.
HVAC diagnostic instrument photographed during the service visit.
Cylindrical run capacitor mounted with strap, connected wiring and nearby relay inside condenser control compartment.
Cylindrical run capacitor mounted with strap, connected wiring and nearby relay inside condenser control compartment.
Attic ductwork with insulated flex duct transitioning to a metal box beside fiberglass insulation near the attic opening.
Attic ductwork with insulated flex duct transitioning to a metal box beside fiberglass insulation near the attic opening.
Attic workspace with flexible air duct, fiberglass insulation, and framing around an open access hatch under a work light.
Attic workspace with flexible air duct, fiberglass insulation, and framing around an open access hatch under a work light.
Foil-insulated flexible ducts connect to a rectangular plenum in attic framing, with foil tape at joints.
Foil-insulated flexible ducts connect to a rectangular plenum in attic framing, with foil tape at joints.
Insulated flexible air duct routed through attic trusses with electrical cables and surrounding insulation.
Insulated flexible air duct routed through attic trusses with electrical cables and surrounding insulation.
— Frequently Asked

Questions about this repair

What was documented about the furnace?

Failed control board

Does AZ Perfect Comfort service Glendale?

Yes. AZ Perfect Comfort services Glendale and the greater Phoenix Metro area. Call (602) 613-3489 to schedule.

Are these repairs guaranteed?

AZ Perfect Comfort Diamond Members receive our Lifetime Repair Guarantee — if the same failure returns, the repair is on us. All other repairs are covered by our standard workmanship warranty. Ask your technician about becoming a Diamond Member to unlock the lifetime guarantee.

Heating RepairLearn about this HVAC serviceHVAC service in Glendale, AZWhat we offer in your neighborhoodAll Furnace Control Board Replacement case studiesBrowse similar real repairsAll repairs in GlendaleReal case studies in your areaAll repair case studiesEvery published repair we’ve documentedComfort Club membershipPriority service and scheduled maintenanceLifetime Repair GuaranteeEvery eligible repair backed for lifeHVAC financing optionsPayment plans for larger projectsAbout AZ Perfect ComfortFamily-run Phoenix HVAC since day one
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