Bradford White UDH-75T-50FR-3N - Manual (Page 5)

Honeywell Gas Control Troubleshooting Chart
LED Status Control Status Probable Cause
Five flashes and
three second pause
Thermostat/well sensor fault.
Gas Control electronic fault detected.
Seven flashes and
three second pause
Eight flashes and
three second pause
Standing pilot remains on while set
point knob is in “OFF” position.
1. Damage to the temperature sensor.
2. Temperature sensor resistance out of
range.
1. Control needs to be reset.
2. Control is wet or physically
damaged.
Pilot valve stuck in open position.
Service
Procedure
1. See service
procedure V
1. Reset Gas Control
2. Replace Gas
Control.
Replace Gas Control.
Flammable Vapor Ignition Resistant Water
Heaters
Green LED Indicator
Observe green LED indicator on
Gas Control. Error flash codes are
displayed with a three second pause
before repeating. Check and repair
the system as noted in the
troubleshooting table below.
5
Water leak detected by accessory
module. Six flashes and
three second pause
Excessive amount of water in drain
pan/water dam.
1. Check T&P valve
2. Check all water
fittings.
3. Pressurize and leak
test tank.
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