Last updated: April 23, 2026
Furnace repair in San Diego County typically runs $200 to $900, starting with an $89 diagnostic that gets credited toward the fix. Ignitor and flame sensor problems make up most of the cheap end. A cracked heat exchanger is the one repair that usually means it's time to talk about replacement instead.
Pacific Beach's dense 1960s-80s cottage and multi-family stock rarely has central ducting, so mini-split heat pump retrofits dominate the call mix here, both for absentee-owner rentals along the Garnet Avenue corridor and owner-occupied conversions replacing old window units. Salt air is a real factor closer to the boardwalk, less so a few blocks inland toward Crown Point. Permits route through the City of San Diego.
Coastal furnaces sit idle most of the year, and that inactivity corrodes ignitors and flame sensors faster than regular use would. A no-heat call in January is almost always an ignition-system fix, which lands in the middle of the range rather than the low end most people expect from a mild climate.
| Item | Typical cost | Notes |
|---|---|---|
| $89 diagnostic visit | $89 | Credited toward the repair once you approve the work |
| Hot-surface ignitor replacement | $250 - $500 | The most common reason a furnace won’t light |
| Flame sensor cleaning or replacement | $150 - $350 | Causes the furnace to shut off seconds after igniting |
| Inducer motor replacement | $400 - $800 | Furnace hums or clicks but won’t start the burner cycle |
| Gas valve replacement | $400 - $900 | Safety component, always tested before replacement is approved |
| Control board replacement | $400 - $800 | More common on furnaces with electronic ignition and diagnostics |
| Blower motor replacement | $450 - $900 | Furnace heats but airflow through the vents is weak or silent |
| Heat exchanger replacement | $1,500 - $3,500 | A safety-critical repair, often the point to consider a new furnace instead |
Ranges reflect Pacific Beach and Coastal San Diego. Your exact figure depends on the factors below. We quote flat-rate before starting.
A furnace repair under roughly $500 on a unit less than 12 years old is almost always the right call. A cracked heat exchanger is different. It's a safety issue, not just a repair line item, because a cracked exchanger can leak combustion gases into the home. On a furnace old enough to need one, we usually recommend replacement over repair, and we explain exactly why before you spend money either way.
The $89 diagnostic gets credited toward the repair once you approve it. SDG&E and TECH Clean California rebates apply to new equipment, not repairs, so they come into play only if a repair turns into a replacement conversation, most often after a heat exchanger fails. We offer financing for larger repairs, and we'll tell you plainly when a repair isn't worth it anymore.
Usually yes, especially for owner-occupied units. A single-zone mini-split heat pump typically runs $4,500 to $8,000 installed, comparable to or not much more than a decent window unit over its lifetime, but delivers meaningfully better efficiency, quieter operation, and heating capability window units don't have. Rental unit owners along Garnet Avenue often upgrade at tenant turnover to reduce future maintenance calls.
Coastal furnaces sit idle most of the year, and that inactivity corrodes ignitors and flame sensors faster than regular use would. A no-heat call in January is almost always an ignition-system fix, which lands in the middle of the range rather than the low end most people expect from a mild climate.
$200 to $900 covers most repairs, including the $89 diagnostic that gets credited toward the fix. Ignitor and flame sensor issues run under $500. A gas valve, control board, or blower motor runs $400 to $900.
Usually yes if the repair is under $500 and the furnace is less than 12 years old. A cracked heat exchanger is the exception. That's a safety issue, and on an older furnace we typically recommend replacement instead.
A flame sensor cleaning or replacement is usually the least expensive fix, typically $150 to $350, and it's one of the most common reasons a furnace shuts off right after lighting.
A heat exchanger replacement runs $1,500 to $3,500 and is the most expensive single repair. Because of the safety issue involved and the age of furnaces that usually need one, we walk through the full replacement cost alongside it.
Flat-rate pricing, confirmed before any work starts. Same-day scheduling on most calls.