32
Bryant Low Heat Pressure Switch Open

Furnace LED shows code 32; blower may run at low speed, limited or no heat output.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Partial vent blockage, undersized or restricted return air, weak inducer on low-heat tap, faulty low-heat pressure switch

How to Fix / Troubleshooting

Safety first: Turn off power before removing panels. Do not adjust factory-set pressure switches.

  • Check air filter and returns: Replace a dirty filter. Ensure all return grilles are open and not blocked by furniture.
  • Inspect venting: Look for partial obstructions in the vent and intake that might only affect low-fire operation (ice buildup, small nests).
  • Check condensate drain (condensing models): Ensure the drain line is clear and properly sloped. A partially blocked trap can affect pressure readings.
  • Observe operation in low heat: Many two-stage Bryant furnaces start in low fire. Watch the inducer and listen for surging or unusual noises that might indicate a weak motor.

If code 32 recurs after airflow and vent checks, the low-heat pressure switch or inducer may require replacement.

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Repair Difficulty

Medium 3/5

Required Part

Low-Heat Pressure Switch
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