Search found 1 match
- Mon May 28, 2012 3:16 am
- Forum: Help and Advice
- Topic: Thermostat Options for EWC-ST Series Control Panels
- Replies: 84
- Views: 273619
Re: Thermostat Options for EWC-ST Series Control Panels
I purchased a house a few months ago and decided to upgrade the thermostats since they were pretty old. A EWC-ST-2C is installed. I installed a HoneyWell RTH8500 to Zone 1, but now only the fan is working when trying to run the A/C. I read that you do need a thermostat with separate B and O inputs. ...