Gas and Oil Home Heating Furnaces - Wiring a Thermo-Pride Furnace

I need some help on wiring my old Thermo-Pride furnace, I don't know how to wire the fan control probe in the duct work. Here is what I have.
2 wires Power-Black White
2 wires Burner-Black White
2 wire Fan Blower-Blue White
3 wires Fan Control-Black Pink Blue
How do I go about wiring all these wires together.
Thanks

You can download a manual with a wiring diagram here: http://www.thermopride.com/technical.cfm

If you have any trouble & can give me the model number, I should be able to talk you thru it.

It is VERY IMPORTANT that fan and limit switches in furnaces be wired to operate properly, and it may not be an especially intuitive thing that you will understand. If you don't know how to do it, pay someone who does to do the job.


I'll give you an example of why this is important:


Ordinarily, the fan switch turns the fan on and off and the limit switch stays closed all the time. I once encountered an imprperly wired furnace, the sides of which were glowing a DULL ORANGE color because of extreme overheating.


After giving the furnace about an hour to cool off, I found the fan and limit switches improperly wired. The limit switch was wired to turn the FAN off if the furnace overheated, rather than turning the burner off.

The filter hadn't been changed, and when the filters got dirty enough, the furnace overheated and the limit switch turned the fan off. That promoted rapid and extreme overheating which it's surprising didn't cause a fire.


This kind of thing is another reason to avoid storing combustible materials around furnaces.




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