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No fan or heat from zones A or C
#5

Tyler,

Good troubleshooting so far. Now that you know a ground signal will start the intended zones. And you know the purpose of the relay is to convert the 12V pos signal from the tstat into a ground signal that the AH is looking for.

Confirm you are getting a a 12V signal from the tstat at the relay terminal.
Confirm the relay is wired correctly, when it is triggered the contacts should make to ground.

Richard and Rhonda Entrekin
95 Newell, 390  Ex caretaker
99 Newell, 512  Ex caretaker
07 Prevost Marathon, 1025
Maverick Hybrid Toad
Inverness, FL (when we're home Cool )
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Messages In This Thread
No fan or heat from zones A or C - by Pluto - 10-26-2024, 01:18 PM
RE: No fan or heat from zones A or C - by Trainer - 10-26-2024, 01:48 PM
RE: No fan or heat from zones A or C - by Pluto - 10-28-2024, 05:20 PM
RE: No fan or heat from zones A or C - by Trainer - 10-28-2024, 05:29 PM
RE: No fan or heat from zones A or C - by Richard - 10-30-2024, 04:59 AM

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