Should I repair my AC or replace it?
This is the repair-or-replace decision framework — not the side-by-side cost table on our AC installation pricing page. Under 10 years with a first-time, named failure: repair. Past 12–15 years — or any compressor-scale failure, or a second refrigerant top-off — replacement math usually wins. In Greater Seattle, add two local inputs before you sign: whether you're on Seattle City Light or PSE (rebate paths differ), and how long you'll stay — a 12-year-old condenser on a five-year horizon often repairs; the same unit when you're planting roots in a Ballard Craftsman often funds replacement. Every AC replacement here should also price the heat pump alternative, because that's where utility money lives.
The quick answer
- Capacitors, contactors, fan motors: repair-tier failures at any reasonable age
- Compressor failure on an out-of-warranty unit: replacement conversation, almost always
- Repeat refrigerant top-offs = paying rent on a leak; fix it or fund replacement
- Replacing anyway? A heat pump does the same cooling and unlocks utility rebates
When repair is right
The unit is under ~10 years old and the failure is electrical-tier: run capacitor, contactor, condenser fan motor, control board. These are known-price fixes on equipment with life left — and if the unit's registered parts warranty is active, the component itself may be covered.
Repair is also right when 'AC failure' is actually airflow: a frozen coil from a clogged filter needs a thaw and a filter, not a condenser. This is why diagnosis-by-symptom over the phone (or by chatbot) mis-prices so many jobs.
Seattle housing stock matters at the margin: a 2005 split system on a West Seattle bungalow with sound ducts and a mid-life furnace is a repair-shaped house. A 1998 condenser on a pre-war Capitol Hill duplex with marginal electrical service is a different conversation — not because the part failed differently, but because the next project (panel, ducts, or heat pump) is already queued on your five-year plan.
When replacement wins
Compressor failure out of warranty is the classic: the repair approaches half a replacement, on a unit whose other components carry the same years. Refrigerant-leak history is the quieter version — each top-off buys one season of the same problem, at rising refrigerant prices, on an old circuit. Age 12–15+ with any four-figure quote: run the math both ways in writing.
One Seattle-specific accelerant: if the unit struggled through the last heat event even when 'working,' it may be undersized for the summers we now get — replacement is the only fix for a sizing problem.
The question to ask alongside: AC or heat pump?
A heat pump is the same cooling hardware with a reversing valve — and unlike straight AC, it takes over most of your heating and qualifies for utility money (SCL instant discounts; PSE conversion rebates if it displaces gas or electric-resistance heat). If your furnace is also mid-life or older, the combined replacement often beats two separate ones a few years apart. Price both; the delta is smaller than most people expect.
This framework pairs with the central-AC-vs-heat-pump guide — not the install-cost comparison table. Panel capacity in pre-war housing often decides the path before brand or tier: ductless or right-sized ducted heat pumps sometimes fit where straight AC plus an aging furnace ignored the electrification question.
What does it cost in the Seattle area?
The Seattle-area context for both sides of the decision:
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)
Central AC installation
$5,100 – $9,800 typical ~$7,400
New central air conditioner added to an existing furnace/ductwork
Sources: Angi — AC replacement cost, Seattle WA (2025–2026) · HVAC Project Cost — Seattle, WA (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)
- Compressor-scale repairs quote far above the typical repair range — that's the replacement trigger
- AC install pricing assumes a healthy furnace blower and ducts; corrections add
- The heat pump premium over AC shrinks after rebates — and it's heating equipment too
- Washington's ~10% sales tax applies to equipment either way
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 traps
The July panic-replace: heat-wave week, no cool, and a same-day bid for whatever's on the truck — often oversized, rarely load-calculated. If you must triage in a heat wave, repair minimally, then make the replacement decision in September on purpose.
The top-off treadmill: 'it just needs a recharge' every June is a leak diagnosis deferred annually at full price. And the mismatched-coil special: replacing only the outdoor unit against an old indoor coil can cripple efficiency and void warranty support — a corner worth asking every bidder about explicitly.
The stay-horizon trap cuts both ways: repairing a 14-year-old unit because you're selling next spring can be rational; repairing it because 'replacement is too expensive' while you plan to live there another decade usually isn't. Write down your timeline before the technician leaves — it turns a stressful afternoon into a framework instead of a reflex.
SCL vs PSE rebate blind spots: replacing with straight AC when a heat-pump bid would have qualified for utility money; or assuming rebates apply to repair. This framework is not the repair-vs-replace cost table — get both paths and the rebate worksheet in writing before July panic overrides the math.
Questions Seattle homeowners ask
My AC needs refrigerant every summer. Repair or replace?
That's a leak, and the honest options are: find-and-fix the leak (worth it on younger equipment), or put the annual top-off money toward replacement (usually right past 10–12 years). A third season of 'just a recharge' means the decision is being made for you, expensively.
The compressor died. Is that automatically a replacement?
If the compressor is under manufacturer parts warranty, a repair can make sense — you pay labor and refrigerant. Out of warranty, compressor replacement typically costs enough of a new system that age decides it, and past 10 years age says replace. Get the math in writing either way. Pair with the heat-pump question if you're replacing — SCL and PSE rebates attach to qualifying new equipment, not compressor surgery on a 13-year-old condenser.
Can I replace just the outdoor unit to save money?
Matching a new condenser to an old indoor coil is usually false economy: refrigerant metering and coil design have moved, efficiency ratings assume matched pairs, and manufacturers may not support mismatches. Sometimes a matched coil swap is modest money — but it belongs in the bid explicitly, not discovered later.
If I'm replacing, why would I pick a heat pump over AC?
Same cooling, plus it displaces most of your heating bill, plus rebates: SCL instant discounts ($300–$600) or PSE conversion rebates ($1,500–$4,000 depending on what it replaces) — straight AC gets none of that. The honest counterpoints: higher upfront cost and possible panel work. We'll price both paths from one visit. Stay horizon matters: five-plus years amortizes rebates and shoulder-season savings; a two-year hold may favor straight AC if the furnace is sound.
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How we know this
Failure economics from Glendale's AC service and replacement work across Greater Seattle; cost ranges from published Seattle-area studies (Angi, HomeGuide, 2025–2026); rebate terms verified July 2026.
Reviewed by the Glendale Heating & Air Conditioning team · Last updated 2026-07-15
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