| Is there continuity across the “Hot Surface Ignitor?” If |
| no, then replace hot surface ignitor. If yes, then replace |
| the ignition module. |
Main valve does not turn on | Put your hand on the gas valve. When the “Valve” LED |
| lights on the ignition module, can you feel it energize? |
| If not, then check the voltages at the ignition module |
| across pins 2 and 7 on the plug “CONTROL”. If there |
| is 24 VAC across these pins, 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. |
Burner Flame keeps going out | 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. |
Thermostat does not satisfy | Is the tank temperature above the temperature set point? |
| Does the T&P relief valve leak? If yes, then replace |
| “Thermostat PC Board.” |
Blower did not post purge | Check “Vacuum Switch” (air intake switch) as |
| previously mentioned. |
| Check “Pressure Switch” (exhaust pressure switch) as |
| previously mentioned. |
| Check “Collector Limit Switch” as previously |
| mentioned. |
| If above switches are all ok, then replace “Ignition |
| Module.” |
|
|
|
|
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