OPEN LIMIT SWITCH - http://www.hvacmechanic.com/ Forums
Original message
| MIKE0220
 |  "OPEN LIMIT SWITCH"
, posted Sat 8 Nov 10:22  
My furnace is blinks 4 times indicating an open limit switch. My problem is, per the diagram I found there looks like there are 3 of these switches and none of them "clicl" when I press them; which I thought would indicate that they have been reset. My fan blows and blows and the heat does not come on.
Mike
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Replies:
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| Xenos
Webmaster 
|  "Re(1):OPEN LIMIT SWITCH"
, posted Sat 8 Nov 10:25
If the fan runs all the time this is a sign that a limit is open. If they won’t reset then one of then may be defective. If you have access to a volt meter you could see what one is open.
Xenos.
The best way to escape a problem is to solve it.
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| | MIKE0220
| "Re(2):OPEN LIMIT SWITCH" , posted Sat 8 Nov 10:27
How exactly do I know if I reset them. Do I just press them?
Mike
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| | Xenos
Webmaster
| "Re(3):OPEN LIMIT SWITCH" , posted Sat 8 Nov 10:50
Yes but depending on the logic in your furnace you may have to kill the main power for 10 seconds then turn it back on.
Xenos.
The best way to escape a problem is to solve it.
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