Fault Diagnosis & Fix
Get a measured diagnosis and a clear repair-vs-replacement answer before any parts are ordered.
Common Repair Pitfalls
Skipping proper diagnostics leads to parts replaced on guesswork, faults that return, and money spent twice.
Replacing a capacitor or contactor without measuring amp draw first means the real fault, often a failing compressor, goes undetected.
Voltage and amp draw tests at each component confirm which part has failed before anything is ordered or replaced.
Topping up refrigerant without locating the leak means the charge drops again within weeks and coil damage can follow.
High- and low-side refrigerant pressure readings identify whether a leak exists and where before any refrigerant work is done.
Colorado’s cold winters stress reversing valves hard; a valve stuck in one mode is often misread as a thermostat or refrigerant fault.
Error code reading combined with a mode-switch test isolates a reversing valve fault from other causes before repair work starts.
Committing to a costly compressor repair on an older unit without comparing it to replacement value can mean spending more than the system is worth.
When repair cost approaches replacement value, you receive a written side-by-side comparison so the decision is yours to make with full information.
Repair Scope
From a single failed capacitor to a refrigerant leak or reversing valve replacement, the scope spans all common failure points.
Pressure testing locates the leak in the line set or coil, then the leak is sealed and the system recharged to spec.
Amp draw and pressure tests confirm whether the compressor is the fault before any replacement decision is made.
A stuck or leaking reversing valve is confirmed by mode-switch testing, then replaced to restore full heating and cooling operation.
Electrical tests identify a failed capacitor or worn contactor, two of the most common causes of a unit that runs but won’t reach temperature.
Dirty evaporator or condenser coils and faulty defrost cycles are diagnosed and corrected to restore rated airflow and efficiency.
Blower motor faults and thermostat wiring issues are tested and resolved so the system responds correctly to demand.
Stored fault codes pulled and interpreted to narrow the diagnosis.
High- and low-side readings taken before any refrigerant work.
Voltage and amp draw tests at capacitor, contactor, and motor.
Full system run-through to confirm the repair holds before sign-off.
Why Choose Us
Accountability at every step, from the first diagnostic call to the post-repair sign-off.
You receive an itemised written estimate covering parts, labor, and scope before a repair is booked or started.
When repair cost is close to replacement value, we provide a written side-by-side so you decide with full cost information.
Air-source, mini-split, and geothermal systems are all within scope, so the right assessment is scheduled for your unit.
Every repair closes with a full system run-through, pressures, airflow, and valve operation checked before sign-off.
The initial visit covers overall equipment condition, not just the presenting fault, so secondary issues are caught early.
Pricing Estimates
| Repair job | Typical cost | Typical duration |
|---|---|---|
| Minor repair | $300-$600 | 1-2 hours |
| Parts replacement repair | $500-$1,200 | 2-4 hours |
| Major repair | $1,200-$1,500 | 4-8 hours |
Common Questions
The most common causes are a dirty air filter, low refrigerant, a failing compressor, or a miscalibrated thermostat. Any one of these stops the system from reaching the set temperature. A pressure check and electrical diagnostic pinpoint which component is at fault before any parts are ordered.
Air moving without temperature change usually points to a refrigerant leak, a failed reversing valve, or a compressor that is running but not building pressure. The fan motor is working, but the refrigerant cycle has broken down. A pressure test and valve check will confirm which component has failed.
Ice buildup is usually caused by low refrigerant charge, a blocked air filter, or a defrost board that has stopped triggering the defrost cycle. Restricted airflow lets coil temperatures drop below freezing, and low refrigerant causes the same effect. Running the system while frozen can damage the compressor, so shut it down and call for a diagnostic promptly.
Turn the thermostat to off, then switch off the circuit breaker for both the indoor air handler and the outdoor unit. Wait 30 seconds, restore the breakers, and set the thermostat back to your desired mode. If the system trips the breaker again or shows an error code, stop and call for a diagnostic rather than resetting repeatedly.
A diagnostic checks refrigerant pressure, electrical components, and control boards before recommending any work. Minor repairs cover items like capacitors, contactors, and drain lines. Major repairs involve the compressor, reversing valve, or heat exchanger. You receive an itemized written estimate before any work begins, so you know exactly what is involved.
Repair makes sense when the system is under 10-12 years old and the fault is a single component. Replacement becomes the better value when repair costs exceed half the price of a new unit, the system uses phased-out R-22 refrigerant, or efficiency has declined noticeably. A written diagnostic estimate lets you compare both options side by side. See heat pump replacement options
Repair costs vary widely based on the failed component. Guide prices run from $300-$600 (Minor repair) to $1,200-$1,500 (Major repair). You will receive an itemised written estimate before any work starts.
The main cost drivers are the specific component that has failed, the system type (air-source, mini-split, or geothermal), refrigerant type and quantity needed, and how accessible the equipment is. Labor time for diagnosis and the cost of the replacement part together make up most of the total.
We cover Heat Pump Repair in and around Lakewood, including Arvada, Colorado, Bear Creek, Colorado, Belmar, Colorado, Edgewater, Colorado, Golden, Colorado, Denver, Colorado, Wheat Ridge, Colorado, Littleton, Colorado, Morrison, Colorado, Ken Caryl, Colorado and Columbine, Colorado. If your area isn’t listed, send us a quick message to check.
Describe the fault and we’ll schedule a full diagnostic in Lakewood and deliver a written estimate before any repair work begins.