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Service Visit · Paradise Valley

Evaporator Coil and TXV Replacement in Paradise Valley — August 2025

CompletedAugust 18, 2025
TechnicianGarrett
Service AreaParadise Valley
Equipment AgeHeat pump: about 5 years old, Air handler: about 5 years old, Heat pump: about 11 years old, Air handler: about 11 years old
Visit Invoice Total$3,288.00
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AZ Perfect Comfort — Our Work
Reported by the Homeowner
The homeowner reported poor cooling and inconsistent performance.
Paradise Valley homeowner · August 18, 2025
The Report

What the homeowner told us

The homeowner reported poor cooling and inconsistent performance.

Findings & Work Performed

What Garrett documented during the visit

I replaced the evaporator coil, installed a new TXV, and added a new filter drier. I also completed two scheduled maintenance visits during this trip.

The Verification

Verification performed

I pulled the system back into operation and verified proper pressures and superheat/subcooling. The temperature split looked good and the system was cooling normally when I left.

— Related Services

How this repair fits into our Phoenix HVAC service

This repair is one example of the AC Repair & Maintenance work AZ Perfect Comfort performs across Paradise Valley, AZ. You can browse every case study we have published for this type of work in the Evaporator Coil and TXV 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
WRC-Coil Recover refrigerant from system and remove existing evaporator coil and install new coil. Install new liquid line filter drier. Properly evacuate system and recharge system with new 410a refrigerant. 1 $2,250.00
CON-100 Clear the condensate drain line. Clean and flush pipe that drains the condensate from the indoor unit to ensure proper draining of condensation created during the heating or cooling cycle. 1 $65.00
Pre Sale Tune Up Presale inspection of HVAC System. Verify Unit FunctionCheck Temperature SplitsClean Outdoor Condenser CoilsWax Outdoor Condenser (If beneficial, Cannot Wax rust)Check Condensate Drain FunctionCheck R 7 $973.00
Total: $3,288.00
— Photo Documentation

46 photos from this repair

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

Outdoor condenser with access panel removed, exposing control board, contactor, wiring harnesses, and service disconnect area for diagnostics.
Outdoor condenser with access panel removed, exposing control board, contactor, wiring harnesses, and service disconnect area for diagnostics.
Air handler condensate drain assembly with PVC trap and cleanout installed, sealed to the unit with foil HVAC tape.
Air handler condensate drain assembly with PVC trap and cleanout installed, sealed to the unit with foil HVAC tape.
Technician rinses debris from the outdoor condenser coil fins inside the unit housing using a hose spray.
Technician rinses debris from the outdoor condenser coil fins inside the unit housing using a hose spray.
Close-up of a thermal expansion valve sensing bulb secured to a copper suction line with insulation partially removed.
Close-up of a thermal expansion valve sensing bulb secured to a copper suction line with insulation partially removed.
Digital HVAC measurement app displays return and supply air readings with a 20.0 °F Delta T across the air side.
Digital HVAC measurement app displays return and supply air readings with a 20.0 °F Delta T across the air side.
HVAC measurement app displays air-side readings with a 20.0 °F Delta T between return and supply conditions.
HVAC measurement app displays air-side readings with a 20.0 °F Delta T between return and supply conditions.
Condensate float safety switch installed on the drain line with insulated suction line and PVC piping at the air handler.
Condensate float safety switch installed on the drain line with insulated suction line and PVC piping at the air handler.
Refrigerant manifold gauges connected at the outdoor unit during service, showing low-side and high-side pressures for system diagnostics.
Refrigerant manifold gauges connected at the outdoor unit during service, showing low-side and high-side pressures for system diagnostics.
Technician rinses debris from an outdoor condenser coil using a garden hose to improve airflow and heat exchange.
Technician rinses debris from an outdoor condenser coil using a garden hose to improve airflow and heat exchange.
Air handler interior with blower assembly, wiring, and control components exposed during evaporator coil and TXV replacement.
Air handler interior with blower assembly, wiring, and control components exposed during evaporator coil and TXV replacement.
Old refrigerant line filter-drier removed and new premium filter-drier with flow direction arrow ready for installation.
Old refrigerant line filter-drier removed and new premium filter-drier with flow direction arrow ready for installation.
Thermostatic expansion valve connection being lubricated during installation, with refrigerant lines and sensing bulb routed along the evaporator assembly.
Thermostatic expansion valve connection being lubricated during installation, with refrigerant lines and sensing bulb routed along the evaporator assembly.
Analog refrigerant manifold gauge connected at the outdoor unit, low-side needle indicating suction pressure during system operation.
Analog refrigerant manifold gauge connected at the outdoor unit, low-side needle indicating suction pressure during system operation.
Close-up of a dusty blower wheel and housing inside an HVAC air handler, showing accumulated debris on the fins.
Close-up of a dusty blower wheel and housing inside an HVAC air handler, showing accumulated debris on the fins.
Digital HVAC measurement display shows Air Side Delta T at 28.4 °F during system operation.
Digital HVAC measurement display shows Air Side Delta T at 28.4 °F during system operation.
Clamp meter displays 0.59 A AC while clamped on a single conductor inside the air handler control compartment.
Clamp meter displays 0.59 A AC while clamped on a single conductor inside the air handler control compartment.
Clamp meter displays 7.94 A AC while measuring current on a clamped conductor at the air conditioning repair site.
Clamp meter displays 7.94 A AC while measuring current on a clamped conductor at the air conditioning repair site.
Dirty pleated air filter removed at an indoor air handler compartment, with wiring exposed and tools on the service platform.
Dirty pleated air filter removed at an indoor air handler compartment, with wiring exposed and tools on the service platform.
Outdoor condenser cabinet open, exposing control board, contactor, wiring harnesses, and service valves with refrigerant lines routed to the unit.
Outdoor condenser cabinet open, exposing control board, contactor, wiring harnesses, and service valves with refrigerant lines routed to the unit.
Fieldpiece app displays return air dry-bulb at 106.8 °F with additional psychrometric values for airside measurements.
Fieldpiece app displays return air dry-bulb at 106.8 °F with additional psychrometric values for airside measurements.
Dirty pleated air filter removed from the air handler, showing heavy dust accumulation across the filter media.
Dirty pleated air filter removed from the air handler, showing heavy dust accumulation across the filter media.
Technician sprays cleaner onto an indoor evaporator assembly, coating the coil and drain pan area during service.
Technician sprays cleaner onto an indoor evaporator assembly, coating the coil and drain pan area during service.
Outdoor air conditioning condensing units with service hoses and tools on the ground during repair work.
Outdoor air conditioning condensing units with service hoses and tools on the ground during repair work.
Technician applies leak detection solution to a brass service valve while gauge manifold is connected to the refrigeration line.
Technician applies leak detection solution to a brass service valve while gauge manifold is connected to the refrigeration line.
Clamp meter shows 19.27 A AC on the clamped conductor at the air conditioning unit.
Clamp meter shows 19.27 A AC on the clamped conductor at the air conditioning unit.
Outdoor condenser with open electrical panel and insulated refrigerant line set on the pad beside the unit.
Outdoor condenser with open electrical panel and insulated refrigerant line set on the pad beside the unit.
Air handler condensate drain assembly with PVC trap and cleanout installed, sealed to the base with foil HVAC tape.
Air handler condensate drain assembly with PVC trap and cleanout installed, sealed to the base with foil HVAC tape.
Digital manifold gauge display shows 141.7 psig suction pressure and 383.1 psig liquid pressure during system operation.
Digital manifold gauge display shows 141.7 psig suction pressure and 383.1 psig liquid pressure during system operation.
Technician rinses debris from an outdoor condenser coil with a hose, showing water spray across the coil fins and components.
Technician rinses debris from an outdoor condenser coil with a hose, showing water spray across the coil fins and components.
Inline refrigerant filter-drier installed on the suction line, showing clean brazed joints and insulated tubing near the condenser.
Inline refrigerant filter-drier installed on the suction line, showing clean brazed joints and insulated tubing near the condenser.
Outdoor condenser with refrigerant manifold hoses connected and a vacuum pump on the ground during service work.
Outdoor condenser with refrigerant manifold hoses connected and a vacuum pump on the ground during service work.
Clean evaporator coil fins inside an insulated air handler cabinet after replacement, with bright reflective foil-faced insulation lining the plenum.
Clean evaporator coil fins inside an insulated air handler cabinet after replacement, with bright reflective foil-faced insulation lining the plenum.
Technician pours cleaner into the air handler’s condensate drain cleanout to clear buildup and improve drainage.
Technician pours cleaner into the air handler’s condensate drain cleanout to clear buildup and improve drainage.
Clamp meter displays 0.30 A AC while measuring current on a conductor inside the air handler compartment.
Clamp meter displays 0.30 A AC while measuring current on a conductor inside the air handler compartment.
New evaporator coil installed with thermal expansion valve and sensing bulb secured, refrigerant lines positioned for connection inside the air handler.
New evaporator coil installed with thermal expansion valve and sensing bulb secured, refrigerant lines positioned for connection inside the air handler.
Technician applies leak detection solution to a brazed copper refrigerant line joint near a service valve and coil.
Technician applies leak detection solution to a brazed copper refrigerant line joint near a service valve and coil.
Manifold gauges connected to the outdoor condenser during service, with refrigerant cylinders and hoses arranged for charging or recovery.
Manifold gauges connected to the outdoor condenser during service, with refrigerant cylinders and hoses arranged for charging or recovery.
Digital refrigerant gauge shows 40.7 psi on the low-side service port during air conditioning system testing.
Digital refrigerant gauge shows 40.7 psi on the low-side service port during air conditioning system testing.
Refrigerant scale display shows 14.0 lb while weighing charge during air conditioner service.
Refrigerant scale display shows 14.0 lb while weighing charge during air conditioner service.
Fieldpiece app screen shows air-side measurements with Delta T reading 20.0 °F between return and supply.
Fieldpiece app screen shows air-side measurements with Delta T reading 20.0 °F between return and supply.
Technician rinses debris from the outdoor condenser coil fins, with compressor top and refrigerant lines visible inside the unit.
Technician rinses debris from the outdoor condenser coil fins, with compressor top and refrigerant lines visible inside the unit.
Indoor air handler in a closet with insulated refrigerant lines and PVC condensate drain piping visible at the base.
Indoor air handler in a closet with insulated refrigerant lines and PVC condensate drain piping visible at the base.
Digital HVAC measurement app displays air side Delta T of 28.4 °F between return and supply.
Digital HVAC measurement app displays air side Delta T of 28.4 °F between return and supply.
Brazed copper refrigerant lines near a TXV fitting, showing heat discoloration and surrounding insulation and tools at the air handler.
Brazed copper refrigerant lines near a TXV fitting, showing heat discoloration and surrounding insulation and tools at the air handler.
Technician holds a removed inline refrigerant filter-drier next to insulated suction line and outdoor condenser base.
Technician holds a removed inline refrigerant filter-drier next to insulated suction line and outdoor condenser base.
Technician applies leak detection solution to a brazed copper refrigerant line joint to check for leaks after repair.
Technician applies leak detection solution to a brazed copper refrigerant line joint to check for leaks after repair.
— Frequently Asked

Questions about this repair

What was the problem with the AC system in this Paradise Valley repair?

The technician found a failed evaporator coil and a sticking TXV that were restricting refrigerant flow and causing poor cooling performance. He replaced the coil, TXV, and filter drier, then completed two scheduled maintenance visits.

Does AZ Perfect Comfort service Paradise Valley?

Yes. AZ Perfect Comfort services Paradise Valley and the greater Phoenix Metro area, including same-day repairs like this one. Call (602) 613-3489 to schedule.

Are these AC 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.

AC Repair & MaintenanceLearn about this HVAC serviceHVAC service in Paradise Valley, AZWhat we offer in your neighborhoodAll Evaporator Coil and TXV Replacement case studiesBrowse similar real repairsAll repairs in Paradise ValleyReal 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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