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Phil
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: 2 years ago.
Category: HVAC
Expert:  Phil replied 2 years 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 2 years ago.
How do I upload the photo
Customer: replied 2 years ago.
The part I replaced was the fan timer board.. The old board was a ST9160B1084. The new boards is a ST9120U.
Customer: replied 2 years ago.
R U there?
Customer: replied 2 years ago.
Photo up loaded
Customer: replied 2 years ago.
I do not have a multimeter
Expert:  Phil replied 2 years 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.
https://www.youtube.com/watch?v=bF3OyQ3HwfU
We can go from there if you wish to do so.
.
Customer: replied 2 years 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 2 years ago.
do you want me to do that?
Customer: replied 2 years ago.
I do have a voltage tester, but I do not think it works on low voltage.
Customer: replied 2 years ago.
It does not work on low voltage
Expert:  Phil replied 2 years 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 2 years ago.
be back in awhile. asap.
Expert:  Phil replied 2 years ago.
.