F14
Protherm
Gas Valve Control Fault
F14 displayed, furnace will not start, gas valve not energized
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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
Open circuit gas valve coil on Protherm gas valve, Loose gas valve connector, Faulty gas valve driver on PCB, Incorrect gas type configuration
How to Fix / Troubleshooting
Safety first: Turn off power and close the gas valve. Only a licensed gas technician should work directly on the gas valve.
- Step 1 – Visual inspection: Check the gas valve wiring connector for looseness or corrosion. Reseat the plug.
- Step 2 – Coil resistance (technician): A technician can measure the resistance of the gas valve coil and compare it to specifications. An open or shorted coil requires valve replacement.
- Step 3 – PCB output check: During an ignition attempt, the technician should verify that the PCB sends the correct voltage to the valve. If not, the PCB is likely faulty.
- Step 4 – Configuration: Confirm that the gas type and valve parameters are correctly set in the installer menu. Incorrect settings can prevent valve activation.
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Repair Difficulty
Professional Required
5/5
Required Part
Gas Valve Assembly
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