Rank: Member
Groups: Registered
Joined: 11/18/2010(UTC)
Posts: 2
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Hi,
I have no heat coming from my Furnace. I have 4 flashed indicating an Open High Limit switch. I replaced the switch and the burners came on briefly but the flame never kicked on. What else can cause the four flashes besides the limit switch being open?
FYI I had a similar situation last Spring when I got 4 flashes. I replaced the limit switch at that time and it seemed to solve the problem for the rest of the season.
Thanks in advance for your help.
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Rank: Member
Groups: Registered
Joined: 11/18/2010(UTC)
Posts: 3
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Check the wiring diagram and see if maybe there is more than one limit in that circuit.
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Rank: Member
Groups: Registered
Joined: 11/18/2010(UTC)
Posts: 2
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Only one limit switch, so that's not the problem.
Could it be the flame rollout switches? Can these be reset?
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Rank: Member
Groups: Registered
Joined: 11/18/2010(UTC)
Posts: 3
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Do they have a small button to push? Right betwen the wiring terminals?
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Rank: Member
Groups: Registered
Joined: 10/18/2010(UTC)
Posts: 41
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There is obviously more of a problem if this high limit has to be replaced annually. Roll out which trips this limit is a sign of greater problems that could be FAMILY SAFETY problems. GET AN HVAC CONTRACTOR FOR A CURE.
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