Quote:
Originally Posted by ChuckS
OP... what really fixed your problem with your HVAC was removing the 12 volts DC to both air conditioner control boxes located on the roof
No amount of rebooting the DC or BCM will clear an issue with the relays in the control modules on the roof..
By turning battery disconnect off and removing shore power you removed the 12 volts DC that is present AT ALL TIMES on those control modules on the roof..
The DC and BCM communicate your HVAC commands across the CANBUS that runs from BCM up to control boxes on the roof
The furnace is controlled via Zone 1 roof AC control box module
You WILL see this issue again so don’t forget what to do...
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What Chuck said. I learned this lesson the second day of owning my system.
If you reboot the In-Command without resetting the power to the gateway's that are installed at your air conditioner systems, they most likely will not communicate to the system any longer without cycling power to them.
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