Will T855iSH work?Steven W. wrote: Thu Feb 13, 2020 10:54 am PRO 1 Thermostats
T601-2 – None Programmable
T725 - Programmable-This one is your best bet
T855 - Programmable
T855i – WiFi Thermostat
T955WH – Wireless Thermostat
Search found 3 matches
- Sun Sep 07, 2025 8:54 pm
- Forum: Help and Advice
- Topic: ST-2D zones are not working properly
- Replies: 6
- Views: 45590
Re: ST-2D zones are not working properly
- Mon Sep 01, 2025 6:44 pm
- Forum: Help and Advice
- Topic: Thermostat Options for EWC-ST Series Control Panels
- Replies: 87
- Views: 1566476
Re: Thermostat Options for EWC-ST Series Control Panels
I see from reading through earlier in the thread that TH4110 series should work with ST series boards. I see from the installation manual for TH4110 that it has all the wire connections needed. The manual seems to think O and B are only for heat pumps - if I just connect the wires, will it work ...
- Sun Aug 31, 2025 5:14 pm
- Forum: Help and Advice
- Topic: EWC Technical Support
- Replies: 16
- Views: 346735
Re: EWC Technical Support
I have 2 zone forced hot air and central AC with EW-ST-2E control board. In 2017, I had my local HVAC professional install the Pro1AQ t855i Wifi Thermostats for each zone. The wifi on the thermostat for the master no longer functions properly. I want ecobee and know that I will need a NCM300 control ...