Search: Posts Made By: snovvman
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12-08-13, 02:47 PM
Replies: 4
Views: 1,630
Posted By snovvman

*** UPDATE *** I did more testing and traced...

*** UPDATE ***

I did more testing and traced the wiring. I found that the 24 volt source at the transformer is solid. The wiring goes from the 24V transformer -> fan limit switch -> R terminal. ...
12-08-13, 12:47 PM
Replies: 4
Views: 1,630
Posted By snovvman

I tested the limit switch, that is not the cause....

I tested the limit switch, that is not the cause. I tested it by jumping the leads (bypassing the switch) and measuring the switch (normally closed).

The exhaust fan is okay too.

Incidentally,...
12-08-13, 12:03 PM
Replies: 4
Views: 1,630
Posted By snovvman

Thank you. I read through the thread. The...

Thank you. I read through the thread. The problems are similar, but with a few key differences:

--My 24V goes to zero on startup, only once, and the heat runs fine for the rest of the cycle.
...
12-08-13, 09:35 AM
Replies: 4
Views: 1,630
Posted By snovvman

24V goes to zero for 30 seconds on heat start?

Greetings,

I have a gas/blower furnace. I am observing that, on starting of heater (jump terminal R and W), as expected, the exhaust fan starts, furnace fires up, and blower starts.

However, a...
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