Softub HEAT function question

dcuste

New member
Apr 30, 2023
4
San Diego
When I first plug in my softub (2 speed motor with C2013 board) comes on with a P display, as normal, and then after about 5 seconds, I hear a short buzz that sounds like a motor starting, the P goes dark, the HEAT light flashes, and then display goes dead and HEAT light for a fraction of a second. Then the whole process starts over again. This will continue as long as it is plugging in.

When the JETS button is pushed, the HEAT light doesn't come on, as normal, and the pump motor will start and run in low for a few seconds and then go to high speed like normal.

The problem seems to be as if the HEAT circuit is shorted and causing the circuit board voltage to drop so low as to cause everything to die and then reset.

What exactly does the HEAT circuit do? How can I isolate the HEAT circuit and test it to see if it is shorted and preventing the softub to run when calling for heat?
 
Unfortunately it seems no one here has gotten that deep into how a Softub works to help you.

If you figure it out then let us know.
 
A search might turn up other threads here.

I'm not saying I know anything about these, but a few pics in the equipment area might prompt some suggestions, especially if there's a diagram in/on the controller lid.

Sorr that's not much help :oops:
 
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