Nest thermostat upgrade works intermittently in 1 year old in house
So I upgraded to Nest thermostat 2020's. My existing setup was a 2 wire setup (R&W only). I rewired everything numerous times at this point and cannot get theses things working reliably. On the most recent rewire I wired everything as the photo shows below.
Current Issues
-Downstairs Thermostat with not setup. App says does not detect C-wire.
-Upstairs I never hard reset due to wanting to make sure everything is working on at least 1 floor first. This thermostat is reading not power. If I do a power test it says VIN 45V. If we change the temp sometimes it'll call and other times it won't.
Current Equipment
-2 Nest Thermostat 2020's
-2 Taco 571-2 valves
-110-24v step down transformer
-1 Williamson Model 1135-601
Although a little vague your wiring is 100% correct.
When you rewire or change wiring to a nest you must reboot it or do a fresh start
so that it learns the new wiring.
I just saw your boiler controller. Did you read its install manual ??
DO NOT connect directly from 3-wire zone valves to the T-T terminals on the boiler. When using 3-wire zone valves, install an isolation relay. Connect the zone valve end switch wires to the isolation relay coil. Connect the isolation relay contact across the boiler T-T terminals. Failure to comply can result in damage to boiler components or cause unreliable operation, resulting in severe property damage.
The relay is required if one or both stats says heating and the boiler doesn't respond or responds intermittently. The relay will have no effect on a thermostat not connecting.
You can use any 24vac single pole relay. Two are shown below.
Hello:
Amateur plumber here with furnace repair problem. -Descriptions follow.
[u]SITUATION[/u]:
[list]
[*]Pilot light on old 1940 Bryant furnace doesn't stay on when lit.
[/list]
[u]TESTS DONE[/u]:
[list]
[*]Cleaned thermocouple of any/all buildup with plain steel wool.
[*]Pilot flame is strong and hitting thermocouple completely.
[*]Volt meter reading indicates that thermocouple is functioning correctly.
[/list]
[u]CONCLUSIONS[/u]:
[list]
[*]Solenoid (within gas valve) must be bad.
[*]Need to replace gas valve.
[*]Order same one, i.e. White Rogers Model 36C03 300, online..
[/list]
[u]INITIAL REPAIR STEPS[/u] (Photo 1):
[list=1]
[*]Turn off gas at large red handwheel.
[*]Remove gas valve via dissembling pipes around the valve unit.
[/list]
[b][u]QUESTIONS[/u][/b]: (Photo 2)
[list]
[*]Joint #1 & Joint #2 are very stiff and won't budge so far.
[*]Would any special tools, besides crescent & pipe wrench, be required to loosen them?
[*]Which joint should be worked on first -- J#1 or J#2?
[*]Is it OK to use penetrating oil, WD-40, & hammer tapping to free them up?
[/list]
-Thanks for any inputs.
[img]https://cimg4.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1500x2000/furnace_w_valve_to_replace_e267c768f71e6d4e09f09c801b4d8ce129112174.jpg[/img]
[i]Photo 1[/i]
[img]https://cimg7.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1500x2000/furnace_pipe_joints_2eb1a980669b893890243a91285f1e4e0760be9d.jpg[/img]
[i]Photo 2[/i]
Hi Gurus,
I am doing troubleshooting and need your expert advise.
Couple of questions:
[list=1]
[*]If screws circled red in picture are removed, it seems to me ball valve assembly will also come out?
[*]Also how much water is expected to come out if I have to replace ball valve assembly as well.
[/list]
[img]https://cimg8.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1500x2000/img_9625_faab8d673cfee12116ef0ab25da2d3e3c9fa1d61.jpg[/img]
[i]Zone Valave V8043e[/i]
[img]https://cimg1.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x1504/img_9629_30b3c24b682d46ff16be04af41dd138408cda155.jpg[/img]
Thanks.
12-02-22, 09:11 AM
