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I recently purchased a new Honeywell furnace fan/limit control for my mid 60s niagra furnace.my old control has screw mounts for the wires.I can see where the wires go,but I cant figure how to insert

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Posted on Jan 02, 2017

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aquaman987

Gary Nigro

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SOURCE: blower fan running constant after new fan and

Here's my best shot.
Check the temperature settings for the fan switch.
The low OFF setting should be about 100 degrees.
The ON setting should be around 150 degrees and this is the setting that "makes" the ON contacts.
The HIGH LIMIT setting should be about 180 degrees.
If these are set, can you use a meter to see if the FAN ON contacts are closed?
Lastly, it appears that one hot line should go to one side of the blower and the other hot line should go to the bottom FAN terminal with the other side of the blower being fed by wiring from the top FAN terminal.
Good Luck. Gary

Posted on Feb 22, 2011

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Here's my best shot.
Check the temperature settings for the fan switch.
The low OFF setting should be about 100 degrees.
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