EWC Controls Forum

I havent swapped out the panels yet. its been pretty cold here, so I was waiting for a more milder day before starting the swap. But, from one of the bulletins I received from EWC for swapping out the ST to the NCM300, the O & B wires are not needed. I know the Nest state requires a common wire,...

Ok, thanks
I will reach out tomorrow when I am home

I have purchased a NCM-300 board to replace my old ST-3E board so that I can use the Nest thermostats throughout my house. I sounded like it would be a basic swap out, but the wiring of my old board and thermostats is confusing me. I have down DIY electrical wiring in the past, so I am comfortable d...

I recently purchased the NCM300 to replace my old ewc board which did not support wi-fi thermostats. My question is, I have 3 damper zones and only 2 our of 3 nest thermostats. On my old board, I have a regular Heat/off/cool thermostat set on Zone 1 and the nest thermostats on zone 2 & 3. When I...

Is there a way to troubleshoot this problem, to determine if its a damper problem, circuit board or relay problem? Are there certified techs that can come out and analyze this?

Im not sure what the problem may be. As I said the system was installed in 2006 and has been running perfect until this past year. the only thing I can think of, is I did have to replace the thermostat for one of the zones. Before all zones were running on LuxPro thermostats. Until the thermostat fo...

Ok
Thank you

I have an EWC ST 3E system. It was installed by an HVAC contractor back in 2006. I have forced heating and A/C with 3 zone dampers. Up until this past year, all the zones opened and closed correctly. Then this year, when I started to use the A/C regardless of which thermostat caused the A/C to come ...