Furnace Open High Temperature Limit Switch

The limit switch includes a sensor in the heat exchanger to determine when the air is warm enough to circulate.

Furnace open high temperature limit switch.

Step 6 set the arm to left of the middle component to approximately 90 degrees fahrenheit. Setting the middle arm at this temperature ensures that the fan will switch on at the correct time when the furnace warms ups. If the furnace failure code indicates an open limit or open high temperature switch or open rollout switch it is probable that the furnace has overheated. This video will help you to diagnose and replace a faulty limit control on your gas furnace.

Limit switches turn off the burner and turn on the circulating fan if there is a high temperature condition in the furnace. 4 4 out of 5 stars 70. I have a 1994 lennox 80 mgf series furnace and there is a 4 ligh flashing which say high limit or rollout switch open what does this mean and where can i find the switch and how can it be fixed witho read more. It reads the temperature of the plenum and waits until it gets appropriately warm.

It also can shut down the furnace burners it if gets too hot inside the furnace identifying a limit switch a typical limit switch consists of a long temperature sensor probe attached to a mounting plate. Coleman 02535381000 furnace temperature limit switch genuine original equipment manufacturer oem part. The high temperature limit switch senses the temperature of a furnace and tells the blower fan to turn on and off at the appropriate times. 4 5 out of 5 stars 13.

Once the air reaches a preset temperature the limit switch turns on the blower. 1 16 of 368 results for furnace high limit switch b13701 55 goodman oem furnace replacement limit switch. Gas furnace hi limit switch testing using mulitmeter.