CT100 with no common, constant polling, battery loss

(Ron S) #1

Guys, do you think that this will help power my thermostat. I don’t have the C wire running for heat on the two CT100’s and as a result within a few weeks the battery is draining like crazy. It functions really well otherwise.

Going through the CT manual and other thermostats including NEST, Honeywell and Ecobee, several guys have been using this external 24V AC transformer with one wire connected to C and one in addition with the second wire to Rh (so, two wires on Rh). Do you think if there is any risk involved in having two wires connected to Rh?. Any thoughts will be highly appreciated.

Lucky to have a C wire on my Ecobee3 (AC only) though.

(Tim Slagle) #2

Should be fine. :smile:


Hooked up one of these puppies a couple of weeks ago to my ct100. Works like a charm

Check this out

(Tim Slagle) #4

After reading all these threads about no c-wire… i feel blessed to have one lol

(Ron S) #5

I am learning too too much these days to hose something! :wink:

(Ron S) #6

Looks like all of these have disappeared from the market… :frowning:


Check amazon.com. $13

(Ron S) #8

Thanks @cdikland! I already ordered one of these and one some other model (original picture that I posted) with a faster prime delivery (no longer available on prime).
Thanks again.