32 (Alt)
Keeprite
Stage-Specific Pressure Switch Fault
On some Keeprite models, code 32 indicates low heat or high heat pressure switch fault on two-stage units.
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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
Incorrect pressure switch for furnace model, Miswired stage 1 / stage 2 pressure switches, Venting sized for single-stage only, Weak inducer on high fire
How to Fix / Troubleshooting
Safety: Disconnect power and gas before servicing.
Steps:
- Verify part numbers: Check the pressure switch part numbers against the Keeprite parts list for your exact model and BTU rating. Replace any incorrect switches.
- Check wiring to stages: Confirm that the low-fire and high-fire pressure switches are wired to the correct terminals on the control board as shown on the wiring diagram.
- Review vent sizing: Ensure the vent diameter and length meet the requirements for a two-stage furnace at full input.
- Test inducer performance: Use a manometer to verify that draft pressure meets the switch rating on both stages. Replace the inducer if it cannot maintain required pressure.
Stage-specific pressure issues should be verified with proper test instruments by a qualified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Pressure Switch
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