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I have an 1984 rudd 75,000btu forced hot air unit with pilot light, while cleaning unit an electrical connector broke off ! it looks like a blue plastic wing-nut, and It has 2 large black wires that go to the thermal cut off sensor. I dont know where it connects to???

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The simple diagram for that specific problem it connected series to thermal cut off sensor.
The two black wires, One came from a power supply line (it means an active power
and the other one goes to the load motor) If you shorted it connection it will run the motor.
But it bypass the sensor.

Unplug the power then try to fix the both end of that black wire connected to terminal bolt of your thermal sensor by replacing the broken plastic nut with a new one.
Fit the nut thight to avoid electrical arch while giving power on at the start.

r_ic7

Posted on Nov 29, 2008

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http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

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3) If pilot flame is clear blue and strong, then next step is check that thermocouple sits in the flame, and then change thermocouple. This is start point. Following step would be reading service manual for exact troubleshoot and testing steps.

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5) Take a moment and rate answer:
And take advantage of fixya expert assistance live.
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