If your AC quit during a Mission Viejo heat wave or your furnace won’t fire on a cold Lake Forest morning, the first question is usually the same: what is this going to cost me? Here’s an honest, up-to-date look at what common HVAC repairs run across south Orange County in 2026 — and how to make sure you’re paying a fair price.
Regularly $129. A full furnace inspection, cleaning and safety check before the first cold night. No plan or membership.
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Typical HVAC repair costs in Orange County (2026)
Every home is different, but here are realistic ballpark ranges for the repairs we do most often across Tustin, Irvine, Mission Viejo, Lake Forest, Laguna Niguel, and the rest of south OC:
| Repair | Typical range |
|---|---|
| AC capacitor replacement | $300–$400 |
| Contactor replacement | $300–$400 |
| Refrigerant leak search + recharge (R-410A) | $700–$1,500 |
| Clearing a clogged condensate drain | $300–$400 |
| Condenser fan motor (OEM) | $850–$1,300 |
| Blower motor | $900–$1,400 |
| Furnace igniter | $350–$450 |
| Furnace flame sensor | $250–$350 |
| Thermostat replacement | $350–$500 |
| Diagnostic visit | $79 (waived with repair) |
These are typical ranges, not quotes — the exact price depends on your equipment and what’s actually failing. We give you a flat-rate price before we start, so you approve the cost up front. For furnace repairs by symptom and part, see our furnace repair cost guide.
What drives the price up or down
- The part itself. A capacitor is inexpensive; a compressor or evaporator coil is a major component.
- Refrigerant type. Older systems using phased-out R-22 cost more to recharge — often a sign it’s time to plan a replacement.
- Access. Attic furnaces in Tustin’s older homes or rooftop units take longer to reach than a garage install.
Repair or replace?
A good rule of thumb: if a repair costs more than about half the price of a new system and your unit is 12–15+ years old, replacement usually makes more financial sense — a modern high-efficiency system also cuts your monthly bill. If the system is newer and the fix is minor, repair is almost always the smart call. We’ll tell you honestly which one you’re looking at, because the person diagnosing your system isn’t paid a commission to sell you a new one.
How to avoid overpaying
- Get the price in writing before the work starts. Flat-rate pricing means no meter running and no surprises.
- Ask if the diagnostic fee is waived with the repair. Ours is $79 and comes off the price when we do the repair.
- Be wary of instant “you need a whole new system” pitches on a simple repair — that’s the #1 complaint about the big franchises.
- Check the license. California requires a CSLB license for HVAC work. Ours is #1062690.
Honest, flat-rate HVAC repair across south Orange County
South County Air Services is a family-owned, owner-operated company based in Tustin with a 5.0-star Google rating across 250+ reviews. We serve all of Orange County Mon-Sat with flat-rate pricing and no commissioned upsell. Need a repair or a second opinion? Call or text (949) 933-3130; for a faster response, text.