Should I repair my heat pump or replace it?
This is the heat-pump repair-or-replace framework — not the equipment comparison table. Heat pumps carry the house all twelve months, so the timeline compresses: under 8 years, repair; past 12, major repairs rarely pencil. Compressor and reversing-valve failures on out-of-warranty units are the classic replacement triggers — and replacement re-opens the utility rebate window that repair never touches. Add local inputs: SCL instant discounts step with HSPF2 tier; PSE conversion terms apply when the old system effectively heated with resistance; pre-war panel capacity may steer ductless vs ducted replacement; and stay horizon decides whether one more season of repair buys planning time.
The quick answer
- Typical heat pump lifespan: 12–15 years (it works summer AND winter)
- Capacitors, contactors, fan motors, defrost sensors: repair-tier at any reasonable age
- Compressor or reversing valve out of warranty: replacement conversation
- Replacement qualifies for SCL/PSE money on the current equipment lists — repair doesn't
When repair is right
Under ~8 years with a named, priced failure in the electrical or control tier — capacitors, contactors, boards, defrost sensors, fan motors. Registered parts warranties (10–12 years on the brands we install) often cover the component, leaving labor. Fix it and keep the maintenance current; this equipment rewards it.
Also repair-shaped: performance complaints that diagnose to charge, airflow, or controls — a slightly low charge or a mis-set backup stage can masquerade as a dying unit. Measure before concluding.
Short stay horizon can tilt repair on borderline age: a 12-year-old ducted heat pump with a failed contactor in a home you're selling next spring is repair-shaped; the same failure in the home where you're raising kids is often the prompt to run replacement math with rebates while the equipment list is still current.
When replacement wins
Past ~12 years facing compressor- or valve-scale work; refrigerant-leak history stacking top-offs; or a first-generation unit whose efficiency the current cold-climate generation simply outclasses (variable-speed, H2i-class low-temperature capacity, HSPF2 ratings that hit the utility discount tiers). The rebate asymmetry matters: a qualifying replacement collects SCL instant discounts ($300–$600) — and if the old unit was effectively resistance-heat-plus-struggle, PSE conversion terms may apply. Repairs collect nothing.
Replacement is also the moment to fix architecture mistakes from the first install — oversized strip backup, wrong dual-fuel switchover, or ductless heads that never loaded properly in small bedrooms. If you're staying five-plus years, paying replacement money without fixing the design just reproduces the same comfort complaints on new hardware.
This framework is not the equipment comparison table — replacement day is when configuration, panel, and rebate tier get one coordinated answer. A qualifying model one HSPF2 step higher can unlock hundreds in SCL instant discount for marginal equipment cost if someone checks the list before you sign.
What does it cost in the Seattle area?
The Seattle-area numbers on each side:
Repair visit / diagnostic
$150 – $450
Diagnostic fee plus a typical single-part repair
National figures — Seattle-area labor typically runs above. Sources: HomeGuide — HVAC repair cost (2026)
Ducted heat pump installation
$8,000 – $16,000 typical ~$10,200
All-electric heating + cooling using your existing ductwork
Sources: HVAC Project Cost — Seattle, WA (citing Angi 2026) (2026) · WattFax — 113 WA homeowner quotes (2026)
Ductless mini-split (multi-zone)
$6,000 – $15,000
One or more outdoor units serving 2–4+ rooms
Sources: Seattle Mini Split Pros cost guide (2026) · Angi — ductless mini-split cost, Seattle WA (2026)
- Compressor-scale repairs on aging units quote at a large fraction of replacement — that's the trigger
- Replacement pricing varies with ducted vs ductless configuration and zones
- SCL instant discounts step with HSPF2 tier (8.1/8.5/9.5) on qualifying replacements
- Twice-yearly maintenance is the honest ownership cost either way — this machine never rests
These are typical Seattle-area market ranges compiled from published cost guides (Angi, HomeGuide, and Seattle-area 2025–2026 cost studies) — market context, not a quote from Glendale Heating & Air Conditioning. Your home's size, equipment, ductwork, electrical, and permits change the number. National figures are marked; Seattle-area labor typically runs above national averages.
The heat-pump-specific traps
Misdiagnosed defrost drama: steam and occasional ice are normal winter behavior — replacing a unit over a $200 sensor or drainage fix happens more than it should. Get the defrost diagnosis before the replacement conversation.
The reverse trap: nursing a 14-year-old unit through annual top-offs and a strip-heat habit (backup resistance heat quietly carrying the house at 3× the cost) — the bills are telling you the replacement decision was already made. And skipping the rebate check at replacement: buying one HSPF2 tier below a discount threshold can leave hundreds on the table for a marginal equipment saving.
Utility-territory confusion closes the list: SCL customers should see instant discount lines on the proposal; PSE customers need model numbers checked against conversion lists and installer-network status. A replacement quote that says 'rebate eligible' without naming the program is incomplete — and in 100-amp pre-war service, skipping the panel answer guarantees a mid-project surprise.
This repair-or-replace framework is not the equipment comparison table — age, failure type, and stay horizon pick the path; rebates and panel scope price it.
Questions Seattle homeowners ask
Why do heat pumps wear out faster than furnaces?
Duty cycle: a furnace works half the year; a heat pump heats all winter and cools all summer. Twelve heat pump years carry more runtime than fifteen furnace years. That's also why twice-yearly maintenance is the honest recommendation for them — it's the only machine in the house without an off-season.
My heat pump is 13 and the compressor died. Any case for repair?
Only if the compressor is somehow still under parts warranty — otherwise you'd be putting near-replacement money into equipment whose other components share the same 13 years. Replacement also collects the current rebate stack and two generations of efficiency. Get both numbers in writing; the math usually speaks clearly. If you're selling within a year, repair-with-disclosure can bridge; if you're staying, replacement is the honest conversation.
The unit runs but the bills exploded. Repair, replace, or something else?
Diagnose first — the classic culprit is backup resistance heat running far more than designed (failed sensor, mis-set controls, or a unit that's lost capacity and leans on strips). Sometimes that's a $300 fix; sometimes it's the aging-unit signature. The measurement, not the age alone, tells you which. In SCL territory with rising electric rates, a strip-heat habit hurts faster than the same mistake on PSE dual-fuel — bring a winter of bills to the service call.
Do replacement heat pumps really get rebates my repair wouldn't?
Yes — the utility money attaches to installing qualifying new equipment: Seattle City Light instant discounts ($300–$600 by HSPF2 tier) and, where a conversion applies, PSE rebates. A repair keeps old equipment running; programs don't pay for that. It's not a reason to replace early — it's a real line in the math when replacement is on the table anyway. Verify your model on the current list before signing; tier thresholds move.
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How we know this
Lifespan and failure patterns from Glendale's heat pump service base across Greater Seattle; warranty terms per the brands we install; rebate tiers verified July 2026 (seattle.gov, pse.com).
Reviewed by the Glendale Heating & Air Conditioning team · Last updated 2026-07-15
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