After thinking about this and looking through the archives, I figured I would post this as a new thread as opposed to a reply to an existing (and probably exhausted) one.
Here is my problem. I have a Sta-Rite SR333, revision 1 control board (I get "r 1" code on the display at power up). After starting the heater, I hear the blower start and then the gas starts and then shuts down. Here is my sequence:
Turn the pump on to get water flowing.
Turn on the heater - blower starts up no problem.
20 seconds later the gas starts but it shuts off almost right away - Service Heater light comes on.
Diagnostic LED inside is not flashing at all.
No error code shown on temp. display. (If I cycle the breaker to the heater, the code r 1 comes up... I now know this is the control board revision)
I have replaced the terminal plugs at the flue sensor and cable harness - no change.
I've twisted the bare wires together to assure a good connection - no change.
I *have* been able to get heater working sometimes during the day, later in the afternoon. Is it possible that dew moisture is shorting out something? How can I further isolate the problem?
I'm not sure the sensor is bad or not. Can I bypass the sensor somehow? What is the expected resistance range of the thermistor that comes from the flue sensor? I've read on some ways to bypass the sensor, replace with a resistor of some value. My heater is about 7 or 8 years old. How long will one of these last in central Florida?
Any ideas from out there would be helpful and appreciated.
John
