Chuck,
I don't think that is correct. I would suggest that you locate the model number of the heater and download the installation/operation manual for the unit. It will give a description on how the unit should and a wiring diagram to help trouble shoot the problem. Sounds like you may have a relay to the motor that is sticking in the closed position.
Martin
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Martin Picke'
1998 Rexhall Anthem 34' DP, Cummins ISB, Allison 6 speed, Spartan Chassis, 300 watts solar.
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