my furnace is constantly running but only cold air... it has an automatic pilot light, i turned off all power and followed the directions for reseting it... still having same problem. the error light is telling me that its the limit switch, is this something that can be a do it yourself replacement?? i found the switch and it is just a little part that has 2 purple wires bolted to the side of the furnace.... please any advice would be greatly appreciated. thanks!!!
2006-11-03 01:27:17 · 6 answers · asked by Anonymous in Home & Garden ➔ Maintenance & Repairs
i clicked the reset button on the limit switch with no results.... so if it has to be replaced is this something that i could do or no??
2006-11-03 01:34:27 · update #1
you should have a couple of limit switches and they are very simple...they just sense temperature and close or open based on which they are for...if you have selected the proper one, its just a matter of turning off all electricity to your unit...unplugging the two connector wires...unscrewing the sensor (should be two phillips screws)...and repeating all operations over...
very easy to perform scale of 1 to 10 I would rate it a 2.5 based on turning off the electricity
2006-11-03 01:33:57 · answer #1 · answered by barrett_shawn 3 · 1⤊ 0⤋
Could be an easy fix, but maybe not. A thermal limit device can be one of several types. It can be an auto reset or manual reset, it can also be a fuse link type device which means it's a one shot deal and has to be replaced. Thermal protection devices can be nearly anywhere on or around the heat exchanger. On most downflow furnaces there is a reverse flow thermal switch near the indoor blower housing and is buried pretty good. For a novice to be jumpering these switches is not advisable.To be quite honest, this sounds like a job for an HVAC tech.
2006-11-03 10:50:02 · answer #2 · answered by Willie_the_weasel 4 · 0⤊ 0⤋
It means your high limit switch is open. You should be able to replace it, you have narrowed it down nicely so far. You could shut the power off to the furnace, rove one wire from the switch and then put an ohm meter across the terminals of the switch, this will tell you if the switch is really open or if it is closed. A battery light tester would work the same.One of those tester with a battery in series with a light.
2006-11-03 09:39:42 · answer #3 · answered by Thomas S 6 · 0⤊ 0⤋
Some Of Them Have Reset Button's On The Top If Not It Will Have To Be Replaced. Remeber To Check The Filter.
2006-11-03 09:30:49 · answer #4 · answered by bob r 4 · 0⤊ 0⤋
I think that this is a custom-built furnace. Changing the switch alone will not do. This is something that one can do it oneself.
It is a question of your safety. You better spend some money and consult the company which supplied you this furnace. I would suggest that you go in for "Annual Maintenance Contract" under which the contractor is obliged to check your furnace at least once in three months or on your call.
2006-11-03 09:34:52 · answer #5 · answered by Anonymous · 0⤊ 2⤋
Jumper limit switches,one at a time,to find the culprit! Check your stack high temp. sensor and see if it has a tiny reset button on it. :-)=
2006-11-03 09:46:15 · answer #6 · answered by Jcontrols 6 · 0⤊ 0⤋