EWC Controls Forum

I have a short on the red and green wires R/G. What are my options besides running a separate cable since the cable run would require opening up walls. There are no spare wires left as all of them are going to the terminal block(s). thank you.

I removed the wire from Zone 3 block. The fan stopped and all 4 zone open LEDs were lit as well as the bypass damper LED. When I connected the wire, it reverted back to Zone 3 open LED lit with fan LED still on (same as previously).

Thank you for your fast response.

1.The fan LED is lit as well.
2. When I remove the G wire from the zone 2 thermostat terminal block on the zone panel, the fan continues to run (no change).

Thank you .

I have an EWC model UZC4 with 4 zones in the house. I have the dip switch setting set to ANY. The system works with any of the other zone fan controls working properly except that the thermostat (honeywell RTH8500) to zone 3 can not toggle the fan on/off..(fan stays on..and I see the Zone 3 Open LED ...