What function doesa limit switch has on a colman gas furnace

abrmudz Posts: 1, Reputation: 1

New Member

Feb 26, 2010, 05:08 PM

What function doesa limit switch has on a colman gas furnace

The board gives me a code of four flashes and icode said that iy is a limit switch

hvac1000 Posts: 14,540, Reputation: 435

Heating & Air Conditioning Expert

Feb 27, 2010, 08:51 AM

The limit switch is a safety device that stops the furnace from over heating.

Add your answer here.

Check out some similar questions!

Open limit switch on Concord Gas Furnace [ 14 Answers ]

I have a Concord 80 Plus Gas Furnace. I am starting the furnace for the winter and it gives me a LED code of open limit switch or limit switch circuit. Everything seems to work fine up until the point where the blower needs to turn on. I had the same problem last year but got a tech to fix it. I am...

Hi-limit switch failure on Amana gas furnace model 80SSE [ 0 Answers ]

Four blinks says reset hi-limit switch. Could not reset stuck button so I replaced it. Still blinks four times. What can I try next?

Rheem Gas Furnace Fan limit switch settings Model # 3214-100fb [ 1 Answers ]

What are the proper settings for this particular model. The fan stays on way to long after the heat/fire shut down, which then causes the house to cool down quickly.

Gas Furnace Limit Switch (Testing) [ 2 Answers ]

My gas furnace doesn't fire-up although I hear clicking inside every time I attempt to toggle the switch bypassing the thermostat. Is it SAFE to short the LIMIT SWITCH to check it that's the problem. Because I remember the furnace was left for several hours running and then all of a sudden it just...

Colman gas furnace clicking, then off [ 1 Answers ]

My colman furnace seems to light up with the ignition properly... the flames are good for the prewarm period, then it clicks 3 times and turns off. I f this happens during the night, and doesn't come on... the small fan that removes unwanted gas before ignition is still running. If I power off...