Carrier Furnace Error Codes: What the Blinking Light Means
Carrier furnace error codes from the maker's own troubleshooting guides: how to count the flashes safely, what each code means, and when to call a tech.
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Furnace repair in Nowthen starts with a $79 trip charge, waived once you approve the repair, and the flat-rate price is in writing first. We fix propane and natural gas furnaces, and if yours backs up a heat pump on Connexus Energy's dual-fuel rate, we check both halves.
A furnace in Nowthen often has more riding on it than one in town. On propane, it may be the only heat in a large house on an open lot; on a dual-fuel setup, it has to take over the moment Connexus Energy interrupts the heat pump. The common failures are flame sensors that coat over, igniters that crack, inducer motors that wear out and pressure switches that won't close. Propane adds its own checks, from the gas pressure at the valve to a regulator or tank problem that belongs to the supplier.
Rural power is the other factor. Storms can drop or dip the power for a second or two, and some furnace control boards respond by locking out until they're reset, which leaves a cold house on a night nobody is watching the thermostat. The older farmhouses add chimney-vented furnaces and ductwork stretched into additions.
Updated November 10, 2026
National averages (HomeGuide, 2026), not our prices: an igniter $100–$250, a flame sensor $80–$250, a pressure switch $150–$400. More in the furnace repair cost guide.
Symptom guides: Leaking water · Burning smell · Red tag · Carbon monoxide · Signs your furnace needs a technician
Turn the furnace off at its service switch, the light-style switch on or near the unit, wait a minute, and turn it back on. Many control boards lock out after a power dip or a string of failed ignition tries and clear themselves after about an hour, but a reset is faster. If it runs through its startup and still quits, call us. We check the board's fault code, the igniter and the flame sensor.
Mostly the same, with a few propane checks added. We confirm the furnace was set up for LP, check the gas pressure at the valve against the propane spec, look at the burner flames, clean the flame sensor and test the venting. The tank and its regulator usually belong to your propane supplier, so a pressure problem upstream of the house is theirs. A furnace tune-up starts at $129, or $219 with the AC.
Carrier furnace error codes from the maker's own troubleshooting guides: how to count the flashes safely, what each code means, and when to call a tech.
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