[robstuff]

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.

[Poodle Head Mikey]

Check the wiring diagram and see if maybe there is more than one limit in that circuit.

[robstuff]

Only one limit switch, so that's not the problem.

Could it be the flame rollout switches? Can these be reset?

[Poodle Head Mikey]

Do they have a small button to push? Right betwen the wiring terminals?

[whsydddy9]

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.