| View single post by dkpd1581 | |||||||||||||
| Posted: Sat Dec 20th, 2008 07:38 pm |
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dkpd1581
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The pop snap may be from the new Honeywell Combination Fan/Limit Switch. There is a break away tab at the 6 o'clock position that has to be kept in place or broken off depending on if the safety controls are low voltage or high voltage. I will look it up and double check before I say which state it should be in; however, according to the wire diagram your safeties are 24 VAC and the controlled devices are 120 VAC. It is quite possible that that you mixed your voltages inadvertanently (by not having the break away tab properly configured for your system) and sent 120 VAC to the T-stat which would fry the heat or W1 circuits in the head and subbase. That the original Honeywell was not turning at all indicates that the bimetal helix was broken and causing your problems.
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