What's your system
doing wrong?
Enter your zip code. Pick your symptom. We dispatch a certified technician — often within 90 minutes.
We've seen your
exact problem before.
Every card is a real job. Real unit. Real failure. Real fix. Sorted by escalating complexity — from a 90-minute capacitor swap to a 2am commercial rooftop rebuild.
Unit
Carrier 24ACC636A003
// SYMPTOM_REPORTED
AC running constantly, house won't cool below 78°F. Client noticed frost on the outdoor unit.
// DIAGNOSIS
Failed dual-run capacitor (35+5 µF). Fan motor struggling to start, causing compressor thermal overload.
// FIX_APPLIED
Replaced capacitor with OEM-spec 35+5 µF/370V unit. Cleaned condenser coils. Verified refrigerant charge at 410A spec.
Unit
Lennox XC21-060 + Air Handler
// SYMPTOM_REPORTED
No cooling, error code E228. Ice buildup on refrigerant lines inside air handler. Unit short-cycling every 8 minutes.
// DIAGNOSIS
Evaporator coil leak — confirmed with UV dye. Refrigerant charge at 40% of spec. Coil corroded at return bend.
// FIX_APPLIED
Full evaporator coil replacement (Lennox X8790). Pressure-tested at 400 PSI nitrogen. Recharged with R-410A to manufacturer spec. 2-year leak warranty.
Unit
Trane XR95 Gas Furnace
// SYMPTOM_REPORTED
No heat. Furnace ignites, runs 45 seconds, shuts off. Blinking error code 3-3 on status LED.
// DIAGNOSIS
Cracked heat exchanger on secondary section. Pressure switch tripping on induced draft motor pressure drop. CO levels elevated.
// FIX_APPLIED
Replaced heat exchanger assembly and pressure switch. Combustion analysis confirmed CO at <5 ppm post-repair. Red-tagged original unit per code.
// RECOGNIZE YOUR PROBLEM?
We've solved it before. We'll solve it today.
Every technician carries a full parts inventory. Most repairs happen on the first visit.
Unit
York YHF060A Rooftop Unit
// SYMPTOM_REPORTED
Restaurant walk-in cooler at 58°F. Health inspection in 14 hours. Rooftop condenser seized, compressor drawing locked-rotor amps.
// DIAGNOSIS
Compressor burnout (acid in refrigerant circuit). Contactor welded closed. Burned motor windings confirmed with megohm test.
// FIX_APPLIED
Emergency compressor replacement (Copeland ZS26KAE-TF5). Full acid flush with nitrogen purge ×3. New filter-drier. Recharged R-22 reclaim. System back at 35°F in 6 hrs.
Unit
Rheem RA1624AJ1NA Split System
// SYMPTOM_REPORTED
Water pooling around air handler in attic. Tenants in unit below reporting ceiling stains. Property manager dispatch.
// DIAGNOSIS
Primary condensate drain blocked by algae. Secondary drain pan cracked and unplugged. Float switch bypassed by previous technician.
// FIX_APPLIED
Cleared primary drain with CO2 flush. Replaced cracked secondary pan. Installed new float switch on secondary. Added BioGuard tablets. Full attic cleanup.
Unit
Daikin DX13SA0481 + Modine Heater
// SYMPTOM_REPORTED
Automotive shop: no heat. Modine gas unit heater igniting then locking out on flame sensor fault. Temp dropped to 42°F overnight.
// DIAGNOSIS
Flame sensor rod coated in silicon oxide from spray-booth overspray. Igniter cracked. Gas valve slow to open on cold start.
// FIX_APPLIED
Cleaned and calibrated flame sensor (0.8 µA reading restored to 2.4 µA). Replaced HSI igniter. Adjusted gas valve manifold pressure to 3.5" W.C. spec.
Schedule My Repair
Four fields. Sixty seconds. Technician confirmed.
Rather call? (800) 555-1234 — answered in under 3 rings, 24/7
The exhale of relief
when the system kicks on.
It was 11:30pm in January. Furnace dead. House at 52 degrees with two kids. ThermostatHVAC picked up on the first ring. Tech was at my door in 78 minutes and had the heat exchanger diagnosed by midnight. We were warm by 2am.
// Trane XR95 — Heat Exchanger Replacement
2:04 AM call-to-comfort
Margaret Chen
Homeowner, Atlanta GA
I manage 14 residential units. When three different AC systems failed the same week in July, I needed one crew who could move fast and document everything for my insurance claims. These guys sent photos, wrote detailed repair reports, and had all three units running in 48 hours.
// Multi-unit — Carrier + Lennox + Rheem
48-hr turnaround, 3 units
Darnell Okonkwo
Property Manager, 14-unit portfolio
The walk-in cooler died at 9pm before a Saturday service. Health inspector due Monday morning. ThermostatHVAC sourced a replacement compressor, drove two hours, and had us back at temperature by 3am. They saved my restaurant.
// York YHF060A — Emergency Compressor Rebuild
6 hr 02 min — $40k in product saved
Rosa Delgado
Owner, Delgado's Cocina, Phoenix AZ