HVAC Questions? Ask an HVAC Expert for Answers ASAP
There are two kinds of limit switches.
The first that we will try to locate is the Main Limit Switch so we can bypass it.
It is a rectangular or square looking device that has two wires attached to it and is usually located inside the furnace cabinet and sits on the back panel wall just above the gas valve. Locate it and let me know when you find it.
It is usually about 2 inches X 3 inches.
i see the gas pipe coming in, and it comes to a circular silver looking thing that also has the on/off switch on it, is that it?
No that is the gas valve.
Look behind the gas valve on the back panel wall inside the furnace cabinet.
on the back panel there is a black plastic, about 2X3, thing with two wires coming out of it, but there doesn't seem to b3e any switches or anything on it
one red and one white wire if that helps any
does it have any writing on it?
yes, looks like a upc code and some other serial numbers and that type of stuff
can i send a picture on this?
Yes you can.
Can you tell me the numbers that is written on it?
012 on the side...
That is it!
i'm a genius
Remove the two wires from the Main Limit Switch and attach them together metal to metal or use a piece of wire to jumper them together.
While they are attached, turn the heat on.
Let me know if the heat comes on or not.
will any old wire do?
It should work. Just make sure it is stripped.
ahhhh, i see glow coming from the conbustion chamber
yes they did, thank you. now do i have to do something as a permanant fix, or is this permanant?
can i just get one of those at home depot or anyting
oh i will