The heat cycles between about 140 and 165. All leads are at a steady 120 until 165 and then lead Lo 2 pulses greater than 120v often higher than 200 and heat cools down.
If I disconnect Hi leads 2 and 3 all Lo leads stay 120 but the temp never rises above 120 degrees altho it does heat.
So I think the supply A and B must be from different legs of the 240v plug and that somehow the high pulse must signal the timer. However, I don't understand why disconnecting Hi doesn't shut off the heat altogether. Do you think that I need to replace 1 or both of the thermostats ( at $85 each) or could the problem be with the timer itself?
Would really like a wiring diagram for the unit.