Model reference

Bradford White URG1PV50S*N

Water Heater

1 document18 error codes

Available documentation

Service Manual

UPV Series Through-The-Wall (TTW) Gas Water Heaters Service Manual44 pg
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1 flash every 4 seconds on my Bradford White URG1PV50S*N

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Stand-by mode, waiting for call for

From Service Manual 650818, p.30:

1.Access service mode to confirm the active fault code and read stored error history.

2.Disconnect the sensor and measure resistance. Expected: 10 kΩ to 12 kΩ at 77°F (25°C).

3.Check the sensor harness for opens. A reading outside 5 kΩ to 50 kΩ indicates a failed sensor.

Part WP8577274

Temperature thermistor

Error codes (18)

CodeMeaning

1 flash every 4 secondsStand-by mode, waiting for call for heat (no fault); temperature demand is…1 flash per secondWeak pilot signal detected on last call for heat.2 flashPressure switch stuck in closed position when it should be open.3 flashPressure switch or blower temperature switch not working in open position…4 flashExcessive tank temperature detected; ECO limit reached 5 flashUndesired/false pilot flame sensed when pilot valve is not open.6-1 flashFailed to light pilot 6-2 flashPressure switch or blower temperature switch opened during burner operation 6-3 flashPilot flame extinguished during operation 6-4 flashUndesired/false pilot flame sensed out of sequence 7 flashFlammable vapor sensor or resettable thermal switch fault detected.7-1 flashFlammable vapor sensor or simulated resistive device resistance above 70,000…8-1 flashFlammable vapor sensor or simulated resistive device resistance below 3,000…8-2 flashTemperature sensor fault detected (damage to wire or resistance out of range).8-3 flashGas valve electronics fault detected.8-4 flashGas valve fault detected.Heartbeat alternates bright/dimThermostat is calling for heat (no fault); tank temperature is below set point.No flashNo electrical power to gas control; control LED not on or flashing.

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