Whitfield II combustion fan won't turn on?!

If your worried about the stoves fans running on after a "out of fuel shut down" you can wire the "one shot timer" and the low limit switch in so that the power feeds through the low limit switch to feed the entire system.

The one shot timer will fire up the entire system when you press the start button and then once the low limit switch closes (with heat) then the power load will transfer through it and to the fans.

With this you can do the wiring so that the main switch just shuts off the feed.

With this set up, the start button will work just like the factory one did, when pressed, the one shot timer is activated, then the fans start and power is fed to the entire stove.

Once the timer runs out, the stove will shut off unless there is heat enough to close the low temp switch.

With this option of wiring, you will simply shut off the fuel feed and the fans will run on until the Low limit switch opens then things will shut off completely.


I prefer to use a master switch to run the exhaust fan and the room air fans and keep the Low limit strictly in the feed circuit.

This makes a diagnostic of troubles easier and also takes the load off the low limit switch.

Just my choice was all.

I would definitely keep the pressure switch in the system.

A vacuum switch the measures the low pressure in the pot area is even better.

Just don't leave it out, as this is a major safety item.

Good luck

Snowy

Can you tell us how long the one shot timer is set for? Did you use the internally or externally adjustable timer or a preset timer? I mean what times to call out for when ordering the timer? I'm assuming at least a 10 minute one so that the stove has time to warm up and close the "low limit" switch? Also I'm drawing schematic up (I'm a draftsman) ,very limited electrical drawing experience though, with a bill of materials for reference then I'll PDF it and send it to Snowy and let him mark it up and I'll correct it and then it can posted if anybody is needing it. As everyone knows with the usual Disclaimers. bjr23

I use a timer with the adjustment on the unit.

Set the one shot for about 15-20 minutes depending on the stove and how long it takes it to warm up and the low side snap switch to close.

Get your timer made so that the adjustment is variable from 5 to 30 minutes approx.

The timer can be made so that it has two spades to connect your push button switch to.

Place the timer inside the mechanical cabinet and start the adjustment at around 20 minutes.

Better to be a tad long rather than too short.

If you go short the timer may run out before the low snap switch closes.

Snowy