Trane and American Standard are, for repair purposes, the same equipment wearing two badges. American Standard's heating and cooling line is built by Trane on identical platforms — the same compressors, coils, control boards, and diagnostics — so parts and repair procedures cross over completely. If a tech can service a Trane, they can service an American Standard. Triton repairs both across the East Bay, Tri-Valley, and Peninsula, from workhorse single-stage furnaces to variable-speed XL and XV systems and AccuLink communicating heat pumps — and we stock the common parts to finish most repairs in one trip.
Below is the Trane and American Standard equipment we service, the faults we see most, and what a repair runs in the Bay Area.
Systems we repair
- Gas furnaces — older flash-code models (XB/XR/XV 80 and 90 series) and newer variable-speed XL and XV furnaces.
- Central air conditioners — single-stage through variable-capacity condensers with matched coils.
- Heat pumps — including AccuLink and ComfortLink II communicating systems that report faults to the thermostat.
Common Trane problems we fix
- Furnace flash-code lockouts. The control board's diagnostic LED blinks a repeating count; after repeated failed ignition or a safety trip, the furnace locks out and stops heating. A 3-flash typically points to a pressure-switch or venting problem, a 4-flash to an open high-limit (an airflow/overheat trip), and a 2-flash to a lockout — but exact meanings vary by control-board generation.
- Pressure-switch & limit faults. A weak draft inducer, a blocked vent or condensate line, or overheating from restricted airflow keeps the safeties from closing.
- Flame-sensing & ignition problems. A dirty flame sensor or a weak igniter causes the burner to light and then drop out — the classic "lights, runs a few seconds, shuts off" pattern.
- AC Err 79 (low-pressure lockout) & Err 80 (high-pressure lockout). On communicating systems, a low charge or a leak trips Err 79, while a dirty condenser coil, a failed fan, or an overcharge trips Err 80.
- Capacitor & contactor no-cool. The common summer condenser fixes — a run capacitor that won't start the fan/compressor, or a pitted contactor.
- Blower/ECM motor failures, refrigerant leaks, and worn boards round out the list.
Trane error & fault codes
Older Trane and American Standard furnaces show a diagnostic LED (red or green) on the integrated furnace control that blinks a repeating count — you count the flashes, then match the number against the legend printed inside the blower door. On communicating AC and heat-pump systems (AccuLink / ComfortLink II), faults appear as Err codes on the thermostat rather than blinks, such as Err 79 (low pressure) and Err 80 (high pressure).
- Trane Furnace Flashing Codes — how to read the blink count and what the common 2, 3, and 4-flash codes mean.
Code meanings can differ by control-board generation and model year, so always confirm the blink count against the diagnostic label inside your own unit before replacing a part.
What it costs in the Bay Area
Cost comes down to the failed part. On the furnace side, a flame sensor runs about $90–$250 and a hot-surface igniter $120–$350 — the usual ignition and lockout fixes — while a blower motor is roughly $400–$700 and a control board $200–$600; most furnace repairs fall in the $129–$800 range. On the AC side (including the Err 79/80 pressure lockouts), a capacitor is about $120–$350 and a contactor $120–$320, a refrigerant leak repair and recharge runs $180–$650, and a compressor is the high end at $900–$1,600, with most AC repairs in the $129–$1,200 range. We charge a diagnostic fee that's credited toward the repair when you approve the work, and you get a firm, upfront price before any part goes in.
Book Trane & American Standard service
Triton services Trane and American Standard furnaces, AC, and heat pumps — alongside every other major brand — across the East Bay, Tri-Valley, and Peninsula, including Redwood City, Pleasanton, San Mateo, Dublin, and Livermore. Same-week and often same-day appointments with licensed techs and upfront pricing.
Book online or call (888) 993-5699.
Related pages
- HVAC Repair in the SF Bay Area — our full heating & cooling hub
- Trane Furnace Flashing Codes — reading the blink-count diagnostics
- Furnace Not Heating / No Heat — the symptom behind a flash-code lockout
- AC Not Cooling / Blowing Warm Air — the summer no-cool, including Err 79/80
- HVAC & AC Repair in Redwood City — Peninsula service area
- HVAC & AC Repair in Pleasanton — Tri-Valley service area
Frequently asked questions
Are Trane and American Standard the same? For repair purposes, yes — American Standard's heating and cooling line is built by Trane on identical platforms, with the same compressors, coils, control boards, and diagnostic codes. Parts and procedures cross over, so a tech who services one services the other. We treat them as one brand family.
What do the flashing lights on my Trane furnace mean? The integrated furnace control has a diagnostic LED that blinks a repeating count. You count the flashes and match the number to the legend inside the blower door — commonly a pressure-switch fault, an open high-limit from restricted airflow, or a lockout after repeated failed ignition. Because the exact meanings vary by board, confirm the count against your unit's own label.
What does Err 79 or Err 80 mean on my Trane AC? On Trane and American Standard communicating systems, Err 79 is a low-pressure lockout — usually a low refrigerant charge or a leak — and Err 80 is a high-pressure lockout, typically a dirty condenser coil, a failed condenser fan, or an overcharge. Both stop the system to protect the compressor and should be diagnosed by a licensed tech.
Why does my Trane furnace light and then shut off? That short-cycle-on-ignition pattern is usually a dirty flame sensor or a weak igniter: the burner lights but the board can't confirm a steady flame, so it shuts the gas off and may lock out after a few tries. Cleaning or replacing the flame sensor fixes most of these.
How much does Trane furnace or AC repair cost in the Bay Area? It depends on the part. A flame sensor is about $90–$250 and an igniter $120–$350; a blower motor runs $400–$700 and a furnace control board $200–$600. On the AC side a capacitor is $120–$350, a refrigerant leak repair and recharge $180–$650, and a compressor $900–$1,600. The diagnostic fee is credited toward the repair when you approve the work.
Do you service Trane in my city? Yes — we cover the East Bay, Tri-Valley, and Peninsula, including Redwood City, Pleasanton, San Mateo, Dublin, and Livermore, with same-week and often same-day appointments. Call (888) 993-5699 to book.