Skip to main content
Search type Search syntax
Tags [tag]
Exact "words here"
Author user:1234
user:me (yours)
Score score:3 (3+)
score:0 (none)
Answers answers:3 (3+)
answers:0 (none)
isaccepted:yes
hasaccepted:no
inquestion:1234
Views views:250
Code code:"if (foo != bar)"
Sections title:apples
body:"apples oranges"
URL url:"*.example.com"
Saves in:saves
Status closed:yes
duplicate:no
migrated:no
wiki:no
Types is:question
is:answer
Exclude -[tag]
-apples
For more details on advanced search visit our help page
Results tagged with
Search options questions only not deleted user 9354

Mechanical or electrical device used to control a heating, ventilation, and air conditioning (HVAC) system, or other temperature reliant system.

0 votes
1 answer
868 views

C terminal voltage on AC control panel

How can I test whether the C wire issue is on the source (AC) or in the thermostat itself. … I am not sure where to put the other probe when testing the C wire on the thermostat, like I did on the grounding nut on the AC side. …
amphibient's user avatar
  • 7,584
6 votes
2 answers
76k views

Controlling separate heat and AC devices from a single thermostat

I would like to control both of these units from a single thermostat with separate thermostat wires going from the thermostat to each respective unit. Is this possible? … Do I need a special thermostat or can any modern thermostat support this split functionality? Product recommendations? …
amphibient's user avatar
  • 7,584
0 votes
3 answers
3k views

How to control 120V power outlet with low voltage

The low voltage wire connecting the thermostat with the compressor (to control the compressor) runs through the attic (as the compressor is on the roof) and I was thinking to put some sort of junction … I am asking this because the fan that I have is not smart and does not take thermostat input, only 120V on/off. …
amphibient's user avatar
  • 7,584
5 votes
2 answers
2k views

How to hardwire combined HVAC system for cooling?

I had to borrow the Nest thermostat from one of my units for another one where it was more needed, while a replacement is on the way. … The equipment worked fine until I removed the thermostat. …
amphibient's user avatar
  • 7,584
0 votes
1 answer
3k views

Does thermostat need to be grounded?

If a thermostat is connected to an air handler, which is connected to the main panel and has a ground wire, should one of the thermostat wires be connected to the ground? …
amphibient's user avatar
  • 7,584