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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Honeywell st9120u. 2x checked all wiring. turn on pwer and

Customer Question

honeywell st9120u. 2x checked all wiring. turn on pwer and blower runs at start and nothing else.
Submitted: 1 year ago.
Category: HVAC
Expert:  Phil replied 1 year ago.
Welcome! We keep going until you have all of the information you need.[b/]. Extensive training & coaching also available.
That model number is ***** computing.
If you can take a well lit, well focused, close up picture of the wiring diagram glued to the inside of the service panel, I can mark it up with coaching instructions. You will need a $30 type multi meter.
We can go from there.
Customer: replied 1 year ago.
How do I upload the photo
Customer: replied 1 year ago.
The part I replaced was the fan timer board.. The old board was a ST9160B1084. The new boards is a ST9120U.
Customer: replied 1 year ago.
R U there?
Customer: replied 1 year ago.
Photo up loaded
Customer: replied 1 year ago.
I do not have a multimeter
Expert:  Phil replied 1 year ago.
Hello again, thanks for wiring diagram.
To do this kind of work you need a multi meter and some practice using it.
Look this video over, let me know what you think, we can go from there.
We can go from there if you wish to do so.
Customer: replied 1 year ago.
I do not have a multimeter. I know how to use one but mine does not work. It will take an hour to get one and be back.
Customer: replied 1 year ago.
do you want me to do that?
Customer: replied 1 year ago.
I do have a voltage tester, but I do not think it works on low voltage.
Customer: replied 1 year ago.
It does not work on low voltage
Expert:  Phil replied 1 year ago.
Yes, go get a new multi meter, not the cheapest one, but one costing $30 or more.
I will hold the question open for you.
Customer: replied 1 year ago.
be back in awhile. asap.
Expert:  Phil replied 1 year ago.

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