Furnace Limit Switch Open Error

The filter has been replaced but still flashes 4 red.

Furnace limit switch open error.

The primary limit switch which prevents the furnace from heating to unsafe temperatures is programmed to reset automatically after a malfunction. Green light and r read more. 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. It will be located at the top of the panel.

Locate the white limit switch. Thank you so much my wife and three year old will appreciate the heat if it works. The code means that there is a limit switch open i will post a pic of one and describe where they are located so you can reset it need a minute or two full size image jacustomer pq8eizy8. Attempting to reset the furnace limit switch while the power is connected may result in electrical shock.

Remove the cover by lifting it upwards or pulling it off to reveal the body of the switch and two metal arms. Limit switches turn off the burner and turn on the circulating fan if there is a high temperature condition in the furnace. Coleman furnaces contain two internal safety components known as high limit switches that are designed to stop electricity from reaching the gas ignition valve if the furnace overheats to dangerous temperatures. Is there a reset.

A fault will appear when it s open or if it doesn t reset within a specified period of time during which the blower is expected to circulate enough air to cool the heat exchanger to. The limit switch will open periodically to prevent over heating. The auxillary fan works and the blower motor seems to be working fine but no flame heat. Founded in 1900 coleman heating and air conditioning has been manufacturing hvac equipment for residential customers for over 100 years.

Goodman residential furnaces contain multiple limit switches to ensure safe operation.