32
Ducane
Low Heat / Second Stage Fault (Two-Stage Models)
Code 32, low heat or no heat, furnace may run at reduced capacity
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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
Second-stage gas valve coil failure, Faulty W2/Y2 call from thermostat, Loose staging jumper on Ducane board, Incorrect thermostat type for two-stage furnace
How to Fix / Troubleshooting
Safety first: Turn off power and gas before accessing gas valve wiring.
- Step 1 – Verify thermostat type: Ensure the thermostat is compatible with two-stage heating if the Ducane furnace is two-stage. Check that W1 and W2 are correctly wired.
- Step 2 – Inspect board jumpers: Some Ducane boards use jumpers or dip switches to control staging. Confirm they are set per the installation manual.
- Step 3 – Check wiring to gas valve: Ensure both stage 1 and stage 2 valve coils are wired securely.
- Step 4 – Professional testing: A technician should measure voltage to the second-stage coil and gas pressures to confirm proper staging.
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Repair Difficulty
Hard
4/5
Required Part
Two-Stage Gas Valve
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