No lights on Argo AZ-6P zone controller


Old 03-14-19, 08:30 PM
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No lights on Argo AZ-6P zone controller

Hi, per attached image, my zone control board isn't lighting up anymore. When I flip power on, I can hear a buzzing from the transformer but nothing is lighting up. I think I might have blown fuse when I accidentally crossed the red and white while messing with the thermostat connections. The problem is, there's no fuse on the control board that I can see. Do I have to pop the transformer out? No black reset switch or anything either.

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Last edited by PJmax; 03-14-19 at 09:20 PM. Reason: resized/labeled picture
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Old 03-14-19, 09:23 PM
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Welcome to the forums.

Thread moved to the boiler forum.

I highlighted the transformer but you say you can hear it humming.
I added a red circle to your picture. Check there for 24vAC.

If you have the 24v there.... you may have burned a foil on the back of the pc board.
If you don't have power there..... you'll need a new 24vAC 40va transformer.

The one in the link is a good deal.... Example of transformer

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