Cost guide · updated September 2026
Furnace Repair Cost in Modesto, CA
As of September 2026, furnace repairs in the Modesto area generally cost $150–$700, in the same range as AC service calls, with the exact price depending on the specific issue. Modesto HVAC Pros can connect you with independent local contractors — (209) 721-8199.
Common furnace issues and general cost bands
We haven't found a separately published, Modesto-specific furnace repair cost breakdown — the figures below extrapolate from the general local HVAC repair range in our AC repair cost guide rather than a furnace-specific source, and we say so plainly rather than presenting them as independently sourced.
| Common issue | General range |
|---|---|
| Igniter or pilot assembly | $150 – $400 |
| Thermostat / wiring | $150 – $400 |
| Blower motor | $300 – $650 |
| Heat exchanger (safety issue — see below) | $600 – $700+ (often close to replacement cost) |
A cracked heat exchanger is a safety issue, not just a repair
Unlike most repairs on this page, a cracked heat exchanger isn't just a cost decision — it can allow carbon monoxide into your home's air. If a technician identifies this, treat it as urgent regardless of price, and make sure working carbon monoxide detectors are installed in your home in the meantime.
Repair or replace?
The same repair-vs-replace logic that applies to AC systems applies to furnaces: if a repair quote is approaching the cost of a major component and your system is older, it's worth comparing against full system replacement — see our installation cost guide or try the 60-second repair-or-replace check on our homepage.
FAQ
Common questions
How much does furnace repair cost in Modesto, CA? +
As of September 2026, furnace repairs in the Modesto area generally fall in the same $150–$700 range as AC repairs, since the same HVAC service-call pricing structure applies to both — the exact cost depends on the specific issue.
What are the most common furnace repairs? +
Igniter or pilot assembly issues, blower motor problems, and thermostat/wiring faults are common, lower-to-mid-range repairs. A cracked heat exchanger is a more serious and expensive repair — and a safety issue that should be addressed immediately, since it can allow carbon monoxide into the home.
Is furnace repair pricing different from AC repair pricing in Modesto? +
We haven't found separately published Modesto-specific furnace repair pricing — the figures on this page are extrapolated from the general local HVAC service-call range covered in our AC repair cost guide, not a furnace-specific source. Get an in-person quote for an exact number.
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