Installation guide

FAULT FINDINGSECTION 7
Put your hand on the gas valve - Can you feel it energize? If not, then check the voltages
at the ignition module across pins MV on the plug GND.
If there is 24 VAC problem, then check to see if the “Rectifier Harness” is secure. If it is
secure, then replace the “Gas Valve”
If you can feel the gas valve energize, check the main gas supply is not in the off position.
MAIN VALVE
DOES NOT TURN ON
Is there minimum gas supplied to water heater as stated on the rating plate? If not, then
increase the supply pressure to the water heater.
Measure the microAmps through the flame sensor using a multimeter. Is there at least 4
microAmps? If not, then replace the “Flame Sensor” or flame sensor wire.
BURNER FLAME
KEEPS GOING OUT
Is the tank temperature above the temperature set point?
Does the T&P relief valve leak? If yes, then replace “Thermostat PC Board.”
THERMOSTAT
DOES NOT SATISFY
Check “Pressure Switch” (exhaust pressure switch) as previously mentioned.
Check “Collector Limit Switch” as previously mentioned.
If above switches are all ok, then please contact the Technical Support Department
at Andrews Water Heaters for further assistance.
BLOWER DID NOT
POST PURGE
50