Carrier Error Codes in Woodland Hills
Quick read: Carrier fault codes in Woodland Hills run from Infinity touchscreen 178/179 communication faults to 59-series furnace lockouts 13, 14, 31, and 34, so call Woodland Hills Carrier HVAC at (213) 513-5256 or book online across 91364 and we read the code, then test the real cause. Photograph the screen before we arrive.
Quick details
- Infinity codes: 178 indoor comm, 179 outdoor comm, 44 airflow, 54/56 sensors, 73 run-cap voltage
- Furnace codes: 13 limit lockout, 14 ignition lockout, 31 pressure switch, 33 limit, 34 ignition proving, 26 rollout, 24 fuse, 45 control
- 180/184/187/286/288 are model strings, not fault codes
- Furnace flashes a two-digit amber LED code (short then long)
- Board / sensor repair: $400 - $2,000; ignition parts $150 - $600
- Service area 91364, 91367, 91371; independent, all brands
How do I read a Carrier fault code?
It depends on the system. An Infinity communicating system displays both the numeric code and a plain-language line on the SYSTXCCITC01 touchscreen, so you can read it directly. A non-communicating furnace flashes a two-digit code on its control-board LED: count the short flashes for the first digit, then the long flashes for the second, so three short and four long equal 34. Photograph whatever you see; it points us straight at the part.
What do the common cooling-side codes mean?
| Code | Meaning / first check | Cost lane |
|---|---|---|
| 178 | Indoor communication fault; thermostat-to-board wiring | $400 - $2,000 |
| 179 | Outdoor communication fault; A-B-C-D wiring or board | $400 - $2,000 |
| 44 | Air-delivery restriction; filter, coil, or duct | $150 - $600 |
| 54 / 56 | Suction or OAT/OCT thermistor out of range | $200 - $700 |
| 73 | Voltage at run cap, no compressor call; cap/contactor | $150 - $450 |
What do the furnace lockout codes mean?
| Code | Meaning / first check | Cost lane |
|---|---|---|
| 13 | Limit circuit lockout; dirty filter, blocked vent, low airflow | $150 - $500 |
| 14 | Ignition lockout; igniter, gas, or flame not established | $200 - $600 |
| 31 | Pressure switch did not close; inducer or blocked flue | $200 - $700 |
| 34 | Ignition proving failure; weak or dirty flame sensor | $150 - $400 |
| 26 | Rollout switch open; inspect the heat exchanger (safety) | Diagnose first |
How do you trace a 178 or 179 communication fault, step by step?
A communication code does not name a part, it names a broken conversation, so the diagnosis walks the bus from the thermostat to the outdoor unit. The order keeps a $30 wiring fix from being misread as a $2,000 board.
- Confirm which side dropped. 178 is the indoor link (thermostat to indoor board); 179 is the outdoor link (control to outdoor board). The number tells us where to start.
- Check line voltage to the faulted unit. A 179 with no 230 volts at the condenser is a tripped disconnect or breaker, not a comm board.
- Inspect and meter the A-B-C-D wiring. We look for water intrusion, corrosion, and loose terminals, especially on hillside outdoor connections South of the Boulevard, and check continuity end to end.
- Re-terminate and seal before replacing. Most rain-season 179 faults clear with a fresh, sealed connection; only a connection that tests good but still faults points at the board.
- Power-cycle and verify. We restore power, confirm the Infinity control re-establishes communication, and clear the stored code.
Why do communication faults spike after Woodland Hills rains?
The Infinity A-B-C-D bus and the outdoor control board do not tolerate water well. After winter storms push moisture into an unsealed outdoor low-voltage connection, especially on the hillside homes South of the Boulevard, we see 179 outdoor faults. Often the fix is re-terminating and sealing the connection, not a new board, which is why a code is a starting point, not a verdict. See the Infinity Greenspeed page for the platform detail.
What can I safely check before booking, and what needs a tech?
For a cooling-side 44 or a furnace 13, you can safely replace the filter, confirm supply and return registers are open, and make sure the outdoor coil and flue are not blocked, then power-cycle once and see if the code returns. For a 34, the flame sensor is a pro clean. Anything involving the gas valve, the heat exchanger (a 26 rollout), the A-B-C-D bus, or the run capacitor (a 73) needs a technician with a meter and the training to work safely around line voltage and gas. A code that returns after one reset is the signal to book a Carrier repair.
What do these codes cost to resolve in Woodland Hills?
Resolution cost depends on whether the code points to a cleanable part, a sensor, or a board. Typical 2026 Los Angeles lanes:
- Airflow (44) and many furnace lockouts (13, 34) - $150 to $600. Filter, flame-sensor cleaning, pressure-switch or igniter work sit here.
- Sensors (54, 56) - $200 to $700. Replacing a suction or OAT/OCT thermistor is a part plus labor.
- Run-cap voltage (73) - $150 to $450. Usually a capacitor, contactor, or relay, not the compressor.
- Communication boards (178, 179) - $400 to $2,000. But re-terminating and sealing the bus often clears it for a fraction of that.
- Rollout (26) - diagnose first. A genuine cracked heat exchanger is a safety condemnation that can favor furnace replacement.
Common questions
What does Carrier code 178 or 179 mean?
Code 178 is an indoor communication fault between the Infinity thermostat and the indoor board; 179 is an outdoor communication fault between the control and the outdoor unit. Both point to the A-B-C-D wiring, a water-damaged board, or lost line voltage, not usually to the compressor itself.
Why does my Carrier furnace flash a code on cold mornings?
Carrier furnaces flash a two-digit code with an amber LED, short flashes for the first digit and long for the second. Common winter codes here are 13 (limit lockout from overheating), 14 (ignition lockout), 31 (pressure switch), and 34 (ignition proving failure). A dirty filter or blocked flue triggers several of them.
Are 180, 184, and 187 Carrier fault codes?
No, and this trips up a lot of people. Strings like 180, 184, 187, 286, and 288 are outdoor unit model or series references, such as the 24ANA or 25HNA families, not fault codes. The genuine communication fault codes are 178 for indoor and 179 for outdoor.
Can I clear a Carrier fault code myself?
You can cycle power at the breaker to clear a soft lockout and get heat or cooling back for a cycle, but that only resets the symptom, not the cause. A code like 13 (limit lockout) or 31 (pressure switch) will return until the dirty filter, blocked flue, or failed part behind it is fixed. Hard lockouts such as 14 and safety trips like 26 rollout should not be repeatedly reset, because they protect against overheating and a possible cracked heat exchanger.
Does a Carrier fault code always mean an expensive repair?
Often not. A 44 airflow code is frequently just a clogged filter or a closed return, a 34 ignition-proving fault is usually a dirty flame sensor cleaned in minutes, and a 179 after winter rain is commonly a wet outdoor connection we re-terminate and seal rather than a new board. The code tells us where to look; the cheap fixes are checked before any board or compressor is condemned.