High-heat pressure switch or relay did not close, or it reopened. The chart says the control relay may be defective or the gas valve may be mis-wired, and it says to see status code 32.
Bryant furnace 31 is the high-heat pressure switch or relay that did not close, or that reopened. The chart says the control relay may be defective or the gas valve may be mis-wired, and it says to see code 32. This page does not copy the code 32 vent list onto 31. Bryant outdoor code 31 is the high-pressure switch on a 288BNV or 189BNV, a different appliance.
Same characters, different appliance: Bryant 31 on an AC / heat pump is a different fault. Bryant AC / heat pump 31.
Likely causes
- High-heat pressure switch or relay did not close or reopened
- Control relay may be defective
- Gas valve may be mis-wired
Safe checks for 31
- Count 3 short flashes and 1 long flash. Do not jumper the high-heat pressure switch
- Technicianfollow status code 32 for the vent, inducer, and tubing checks this chart points at, and check the relay and gas-valve wiring named on 31
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician. High-heat pressure faults are not a filter replacement.
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Parts & tools for this fix
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Furnace pressure switch: guide
In this code: High-heat pressure switch or relay did not close or reopened
This one is for a technician to test or replace, so we only explain it and do not link to buy it.
Furnace inducer (draft) motor: guide
Technician step in this code: follow status code 32 for the vent, inducer, and tubing checks this chart points at, and check the relay and gas-valve wiring named on 31
This one is for a technician to test or replace, so we only explain it and do not link to buy it.