Utica Dunkirk E134 Error Code

What does Utica Dunkirk E134 mean?

E134 on Utica-Dunkirk DCC/DCB condensing boilers indicates that the gas supply valve was opened by the control board but the elapsed time passed without flame being detected — effectively a blocked or absent gas supply condition. The boiler interprets this as the gas valve failing to deliver gas, triggering a safety lockout that requires a manual reset.

Symptoms

• Boiler display shows E134 and enters lockout
• Spark is audible but burner never lights
• Boiler performs multiple ignition attempts then shuts down
• Gas odor may or may not be present at the appliance

Common causes

• Gas supply shut off at the meter, street, or appliance isolation valve
• Insufficient gas supply pressure (below 3.5" w.c. for natural gas)
• Defective or stuck-closed gas valve
• Air in the gas supply line after maintenance or interruption
• Faulty PCB gas valve command circuit

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Diagnostic steps

1. Verify gas supply is open

   Confirm the manual isolation valve under or behind the boiler is fully open and that service at the meter has not been interrupted.

2. Check gas pressure

   Connect a manometer to the inlet pressure test port on the boiler. Natural gas must be at least 3.5" w.c. at full load; LPG at least 8.0" w.c.

3. Purge air from the gas line

   If gas supply was recently interrupted, loosen a union downstream of the meter briefly to purge air, then retighten before attempting to relight.

4. Press the RESET button

   Press and hold the RESET (R) button for at least 2 seconds to clear the lockout. The boiler will re-attempt ignition.

5. Inspect the gas valve wiring and spark electrode

   Check the cable from the PCB to the gas valve for damage. Inspect the spark electrode and cable for cracking or contamination and clean or replace as needed.

When to call a professional

If E134 recurs after confirming gas supply is open and pressure is correct, the gas valve or PCB requires diagnosis by a licensed technician. Gas valve replacement must only be performed by a qualified service technician; working on gas-carrying components without proper certification is illegal in most jurisdictions and creates a serious explosion hazard.