本文发表在 rolia.net 枫下论坛I had a cold furnace air problem: 4 RED blinks. I tried this and worked, but please turn off the power for the sake of safety:
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bowen-77
bowen-77
Rank: Apprentice
Rating: 100%, 1 votes
Thanks Machtcl1!!!!! You're a genius! I had the same problem too (no heat/4 blinks). The motor had been replaced during the summer and yesterday I turned the heat on for the first time (man it was cold here in Ottawa, Canada) and no heat was coming out of the vents. I did what you suggested, located the switch (glad you described it as "a little bigger than a dime" because I would have never found it! Mine was located inside and on top of the fan stuck on the top part of the whole box. But a little tap mad it work like a charm. Weird how this thing works but it worked!!! Light was not blinking anymore and was good to go. I did write down the serial as you suggested in case it happens again and I neet to replace it. So now I feel like a genius too! Saved me a $90 service call.
Solution #2
posted on Feb 01, 2009
You have a limit switch located in the furnace (a little bigger than a dime and located near the center of the front panel, sometimes the switch is mounted to a small fiberglass board) . There will be two wires going to it. They sometimes trip so often that they fail to automatically reset(due to dirty filters or undersized ductwork). You can SHUT OFF POWER TO THE FURNACE, then remove the two screws holding the switch in the furnace, pull the switch out of the furnace and tap on it and wipe it off.
The switch may work a few more times but should be replaced with the same size and type. You will see some rating printed on the switch somewhere. Write down all the numbers and get a replacemet from a furnace/AC supply house. If you have a meter and know how to use it you could check the switch for continuity.
Sometimes just a tap on the switch will get it going. There will also be a couple of rollout switches that could be tripped. They have little buttons on them to reset them. If they trip it may have other issues to be solved.
Hope this helps!
Matt更多精彩文章及讨论，请光临枫下论坛 rolia.net
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bowen-77
bowen-77
Rank: Apprentice
Rating: 100%, 1 votes
Thanks Machtcl1!!!!! You're a genius! I had the same problem too (no heat/4 blinks). The motor had been replaced during the summer and yesterday I turned the heat on for the first time (man it was cold here in Ottawa, Canada) and no heat was coming out of the vents. I did what you suggested, located the switch (glad you described it as "a little bigger than a dime" because I would have never found it! Mine was located inside and on top of the fan stuck on the top part of the whole box. But a little tap mad it work like a charm. Weird how this thing works but it worked!!! Light was not blinking anymore and was good to go. I did write down the serial as you suggested in case it happens again and I neet to replace it. So now I feel like a genius too! Saved me a $90 service call.
Solution #2
posted on Feb 01, 2009
You have a limit switch located in the furnace (a little bigger than a dime and located near the center of the front panel, sometimes the switch is mounted to a small fiberglass board) . There will be two wires going to it. They sometimes trip so often that they fail to automatically reset(due to dirty filters or undersized ductwork). You can SHUT OFF POWER TO THE FURNACE, then remove the two screws holding the switch in the furnace, pull the switch out of the furnace and tap on it and wipe it off.
The switch may work a few more times but should be replaced with the same size and type. You will see some rating printed on the switch somewhere. Write down all the numbers and get a replacemet from a furnace/AC supply house. If you have a meter and know how to use it you could check the switch for continuity.
Sometimes just a tap on the switch will get it going. There will also be a couple of rollout switches that could be tripped. They have little buttons on them to reset them. If they trip it may have other issues to be solved.
Hope this helps!
Matt更多精彩文章及讨论，请光临枫下论坛 rolia.net