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Bellingham Heating & Cooling — Bellingham's Energy Savings Team
Old outdoor unit alongside its replacement heat pump at a Bellingham home

Repair the existing system vs. Replace the system

Repair or replace an old heat pump: how to decide without guessing

Repair when the unit is under 12 years, the refrigerant is current and the fix is a part. Replace when the compressor goes, the system is on R-22, or the repair approaches half of new. What PSE pays either way.

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The short answer

Repair a unit under about 12 years old when the failure is a part — a board, a fan motor, a contactor, a sensor. Replace when the compressor fails, when the system runs on R-22, or when the quote approaches half the cost of new equipment. Age plus refrigerant type usually decides it before the diagnosis does.

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Repair the existing system vs. Replace the system, line by line

Where one option is genuinely better for a Bellingham house, the cell is marked. Where it is a wash, we say so.

What you are comparing Repair the existing system Replace the system
Cost today A part and labour. Almost always the cheaper invoice this week. better A full project. Published Bellingham figures for a ducted heat pump run roughly $4,000 to $8,000, and ductless roughly $3,000 to $10,000 by zone count.
Cost over the next five years Unknown, and on an old unit each repair buys less time than the last one did. Predictable, with a warranty and a known efficiency. better
Refrigerant availability A system charged with R-22 is the hard case. Recovered and reclaimed supply is limited and costly, and a leak repair on an R-22 system is money into a dead end. Current refrigerants with current parts channels. better
Efficiency and running cost You keep whatever efficiency the unit had, minus whatever it has lost to a fouled coil and a tired compressor. A current variable-speed system in the top PSE midstream tier reaches 16.0 SEER2 and 9.5 HSPF2, and it modulates through our long mild shoulder season instead of cycling. better
Rebates None. There is no rebate for a repair. PSE’s heat-pump-to-heat-pump upgrade rebate pays $1,500, or $2,400 with Efficiency Boost, but it is ducted-only and ductless does not qualify. The midstream equipment discount adds $300 to $600 by tier. better
Time without heat Often same-week, sometimes same-day if the part is on the van or in a local supply house. better A planned project with lead time for equipment, a mechanical permit and an inspection.
Risk of a second failure High on a 15-year-old system. Fixing the fan motor does not make the compressor younger. Low, and covered. A new system starts a fresh warranty clock. better
Coastal corrosion damage A corroded coil and cabinet on a saltwater property is often the real problem, and no part replaces it. A chance to specify corrosion protection, which matters where salt air can shorten equipment life by two to four years. better

Rows with no mark are close enough that the difference will not decide your project.

Choose Repair the existing system if

  • The system is under roughly 12 years old, the refrigerant is current, and the failure is a discrete component.
  • The repair is well under half the cost of replacement and the rest of the system tests healthy — good coil, good compressor amp draw, correct charge.
  • It is January, the house is cold, and getting heat back this week matters more than optimising the next fifteen years.
  • You are selling within a year and a working system, honestly disclosed, is what the transaction needs.

Choose Replace the system if

  • The compressor has failed, or the system is charged with R-22. Either one on its own is usually enough to stop repairing.
  • The unit is 15 years or older and this is the second or third call in two seasons.
  • You want cooling, better filtration for smoke season, or the room-by-room control the old single-stage system never offered.
  • The system is ducted and you can claim PSE’s heat-pump-to-heat-pump upgrade rebate of $1,500, or $2,400 with Efficiency Boost, which changes the arithmetic substantially.

What changes this answer in Bellingham

Two local factors move this decision. The first is salt air: within a few blocks of saltwater, corrosion can shorten equipment life by two to four years without protection, and a corroded coil and cabinet is a replacement condition rather than a repair. The second is rebate asymmetry — PSE’s heat-pump-to-heat-pump upgrade rebate pays $1,500, or $2,400 with Efficiency Boost, but it is ducted-only and explicitly excludes ductless, so a failing ductless system has no upgrade rebate behind it while a failing ducted system does. The upgrade rebate also carries cold-climate thresholds: a COP of at least 1.75 at 5°F and capacity at 5°F of at least 70% of capacity at 47°F. That is a sensible bar anyway at our 19°F design temperature. Our diagnostic visit carries an $89.99 trip charge refunded as company credit if you accept the bid, so getting a real diagnosis first does not cost you the price of the decision.

Washington's energy code puts Bellingham's outdoor heating design temperature at 19°F, against 24°F at Sea-Tac, in climate zone 4C (marine). We size from a load calculation against that number, not from the square footage of the house.

Money that moves this decision

  • $1,500

    Available now

    $2,400 with Efficiency Boost. Ducted systems only — ductless is not eligible.

    Paperwork:
    We file it
    Deadline:
    No published end date — tariffed and subject to change
    Verified:
    2026-09-04 · source

  • Raises other PSE rebates

    Income-qualified

    Heat pump $1,500 → $2,400 · heat pump water heater $1,000 → $1,100 · smart thermostat $75 → $175.

    Paperwork:
    We file it
    Deadline:
    Ongoing
    Verified:
    2026-09-04 · source

  • Midstream HVAC Equipment Discount

    Puget Sound Energy (with ICF)

    $300–$600

    Available now

    Tier 1 $300 (SEER2 ≥15.2 / HSPF2 ≥8.1, retrofit only) · Tier 2 $400 (SEER2 ≥15.2 / HSPF2 ≥8.5) · Tier 3 $600 (SEER2 ≥16 / HSPF2 ≥9.5).

    Bellingham note: Whether this discount can be combined with the $1,500 conversion rebate is unconfirmed: PSE’s conversion page says its rebate "cannot be combined with any other rebates except where noted", while PSE’s heating hub tells customers to ask their contractor. We quote it separately and confirm with a PSE Energy Advisor before counting it toward your total.

    Paperwork:
    Comes off the equipment price
    Deadline:
    No published end date
    Verified:
    2026-09-04 · source

  • $1,500

    Available now

    $2,400 with PSE Efficiency Boost for income-qualified households.

    Paperwork:
    We file it
    Deadline:
    No published end date — tariffed and subject to change
    Verified:
    2026-09-04 · source

  • $0 — terminated

    Ended

    Historically 30% of cost, up to $2,000/year for heat pumps and heat pump water heaters. Gone. The One Big Beautiful Bill (P.L. 119-21, enacted July 4, 2025) accelerated its termination.

    Paperwork:
    You file it
    Deadline:
    Terminated — property placed in service after December 31, 2025 does not qualify
    Verified:
    2026-09-04 · source

Questions Bellingham homeowners actually ask

Is there a simple rule for repair versus replace?
The most useful one is age plus refrigerant, then cost. Under about 12 years on a current refrigerant with a component failure, repair. Fifteen years or older, or on R-22, or a failed compressor, replace. In between, replace if the repair approaches half the cost of new equipment, because the second repair usually follows the first.
What is the problem with R-22?
Production and import of R-22 ended, so the only supply is recovered and reclaimed refrigerant at a price that reflects scarcity. Repairing a leak on an R-22 system means paying premium refrigerant into equipment that is already near the end of its life, and there is no path to making that system better. It is the clearest replace signal in the trade.
Does PSE pay anything toward replacing an existing heat pump?
Yes, if the system is ducted. PSE’s heat-pump-to-heat-pump upgrade rebate pays $1,500, or $2,400 with Efficiency Boost, for ducted systems only — ductless is not eligible — and the new equipment must meet cold-climate thresholds. The midstream equipment discount adds $300 to $600 by efficiency tier. Whether the two stack is unconfirmed and we will not promise it.
Can you tell me over the phone whether to repair it?
We can tell you which way it is likely to go from the age, the refrigerant on the data plate and the symptom, and we will. We cannot responsibly commit to a repair-or-replace recommendation without measuring the charge, the amp draw and the coil condition, which is what the diagnostic visit is for.
How long will a new system last here?
Longer inland than on the water. The variable we can actually control is corrosion protection on a coastal site and a real maintenance schedule — coil cleaning matters more here than in a dry climate because fir needles, moss and salt all end up in the outdoor coil. Ask us to write the maintenance cadence into the handover rather than leaving it implied.

Next steps on this decision

Get this priced both ways

We will quote the option that fits your house and tell you what the other one would have cost, so the comparison is yours to make, not ours.

Or call or text (360) 592-3824. Estimates carry the standard $89.99 trip charge, refunded as company credit when you accept the bid. We do not sell or share your details.

Ready for a straight answer on your house?

Tell us what you have now and what you want it to do. We will tell you what fits, what it costs, and which rebates you actually qualify for — before anyone comes out.

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