Runs but does not heat the house
Thermostat call, outdoor conditions, airflow, delivered capacity, reversing-valve command, and backup-heat staging.
A comfort complaint is not proof that the compressor failed.
Residential air-source heat pump service
Heat Pump Repair Cost (2026)
Start with the confirmed fault, then compare the repair scope. Heating, defrost, changeover, and backup-heat problems need different evidence from a cooling-only AC repair.
Direct answer
For budget comparison, our model allows $100–$300 for diagnosis and $200–$4,500 for component work and ordinary repair labor. Add separate dispatch and access allowances only when relevant. Refrigerant, permits, electrical corrections, and return visits need written itemization. These are editorial allowances, not a measured local average.
Repair Allowances by Confirmed Component
Component bands include ordinary part and repair labor only. Diagnosis is a separate $100–$300 allowance unless included or credited in the contractor's quote. Sealed-system estimates can exceed these bands once refrigerant and project-specific work are priced.
| Repair scope | Component/labor allowance | Evidence to request |
|---|---|---|
| Thermostat, sensor, or low-voltage control | $200–$900 | Call for heat/cooling, sensor readings, wiring, compatibility, and final operation. |
| Defrost sensor or control board | $300–$1,300 | Ice pattern, sensor and board tests, defrost initiation and termination, drainage, and fan operation. |
| Reversing valve / heating-cooling changeover | $700–$2,200 | Control signal versus mechanical valve failure; sealed-system work and refrigerant must be itemized separately. |
| Auxiliary heat relay, sequencer, or heat-strip assembly | $250–$1,500 | Staging, thermostat settings, current draw, electrical capacity, and whether auxiliary heat is actually malfunctioning. |
| Outdoor fan or indoor blower | $450–$1,800 | Motor/module type, current draw, airflow, static pressure where applicable, and control checks. |
| Inverter / variable-speed drive electronics | $900–$3,000 | Manufacturer fault code and test procedure, supply voltage, motor/compressor compatibility, and part warranty. |
| Leak, coil, or compressor repair scope | $1,200–$4,500 | Confirmed leak or failed component, part availability, refrigerant type, evacuation, charge, and final testing. |
What Does the Symptom Actually Establish?
Outdoor coil stays heavily iced
Document ice pattern, drainage, fan operation, defrost sensor/control tests, and refrigerant findings where appropriate.
Separate normal frost/defrost behavior from ice that persists or blocks operation.
Auxiliary heat runs frequently
Compare settings, design conditions, defrost sequence, balance-point strategy, and actual capacity or equipment faults.
Heat-strip operation alone does not establish a broken part.
Cannot switch heating and cooling
Check control signals, valve actuation, wiring, and manufacturer procedures before pricing valve work.
Separate an electrical control issue from opening the refrigerant circuit.
Variable-speed equipment shows a fault
Record the exact code and manufacturer-directed voltage, drive, motor, and compressor tests.
A fault code is a starting point, not permission to guess an expensive board.
Repair or Replace?
An isolated control repair with confirmed warranty and stable system operation is a different decision from repeated sealed-system faults, unavailable electronics, or unresolved winter capacity. Get separate written options when the proposed work is major. Compare heating output, backup strategy, ducts, electrical work, permits, startup, and labor warranty before comparing totals.
Compare complete heat pump replacement scopeThe installation Quote Checker evaluates replacement bids; it does not score heat pump repair prices. Use the component evidence and repair calculator on this page for service work.
FAQ
How much does heat pump repair cost?
Our editorial planning model allows $100–$300 for diagnosis and $200–$4,500 for component repair and ordinary labor, depending on the confirmed fault. Separate diagnosis, emergency dispatch, difficult access, refrigerant, permits, and electrical corrections can add to the total. These are comparison allowances, not surveyed local prices or a contractor quote.
Does ice on a heat pump mean it needs a new defrost board?
No. Frost can occur in heating operation, but persistent ice or poor heating needs diagnosis. Ask for airflow, fan, drainage, sensor, controls, and refrigerant findings before authorizing a component. Do not chip the coil or bypass safety controls.
Is auxiliary heat always a repair problem?
No. Auxiliary heat can be part of the system's design and control sequence. Ask whether outdoor conditions, defrost, thermostat settings, a capacity shortfall, or an actual equipment fault explains its use before accepting a heat-strip or control replacement.
Should I repair or replace a 12-year-old heat pump?
Age alone does not decide. Compare the diagnosed fault, repeat failures, covered parts and uncovered labor, compatible-part availability, heating performance, and complete replacement scope. The calculator flags certain major repairs on systems aged 12 or older for comparison; that is an editorial review prompt, not a life-expectancy prediction.
Does a parts warranty make heat pump repair free?
Not necessarily. Diagnosis, labor, refrigerant, shipping, access, and dispatch may be excluded. Obtain a written dollar credit and included scope. The calculator subtracts a confirmed component-work credit only, capped at the lower component allowance.
Methodology, Assumptions, and Sources
Clear HVAC Costs assigns editorial component allowances to compare written residential air-source repair proposals. These bands are not a contractor survey, transaction dataset, local price feed, or manufacturer price list. The model adds diagnosis ($100–$300 when separate or diagnosis only), after-hours dispatch ($150–$500 when selected), and difficult repair access ($150–$600 when selected). Diagnosis-only visits do not receive the repair-access allowance. A confirmed credit reduces component work only and is capped at its lower allowance. System age changes a comparison prompt, never the estimated price.
Manufacturer guides provide a scope cross-check: Trane lists reversing-valve repair at $1,000–$2,300, while Carrier lists $350–$1,250 and attributes its national cost estimates to HomeAdvisor. Their differing scopes are not a single market average. Our grouped component bands and dispatch/access adders remain editorial assumptions, especially for inverter and auxiliary-heat work. DOE sources explain operation and frost/defrost mechanisms; they do not validate dollar bands. Final price, repairability, refrigerant quantity, warranty eligibility, and safety require onsite diagnosis and an itemized proposal. Last reviewed October 19, 2026.