New answers tagged

1 vote

Ecobee Thermostat / Common Maker / Gas Valve

Transformer R needs to go to thermostat R Your first problem is that you have your existing thermostat wired "backwards" with the transformer hot (R) wire connected to the thermostat's W ...
1 vote

I'm trying to control heat remotely in a shop/garage that is subject to sub-freezing temps (which is OK with me when it is not in use)

Example Nest thermostat (I have one) It is smart but only if you give it power to operate. The R and the C have to be connected. It knows when I am not home (using my cell phone as signal) and ...
  • 8,806
2 votes

I'm trying to control heat remotely in a shop/garage that is subject to sub-freezing temps (which is OK with me when it is not in use)

A smart 'stat won't care if a dumb 'stat is in parallel with it. However, I am guessing you did not run a C wire to the smart 'stat. So how is the smart 'stat powering itself? In that case, the ...
0 votes

I'm trying to control heat remotely in a shop/garage that is subject to sub-freezing temps (which is OK with me when it is not in use)

Honeywell makes a number of different WIFI connected tstats, if you have WIFI in your shop that would be your best bet. I have one in a vacation home and it's awesome to be able to "turn up the ...
0 votes

Problems with Honeywell T5 Thermostat Short-Cycling in Heat Mode

You already know what the problem is. The transformer is not powerful enough to provide power to the gas furnace the AC and the new Thermostat. Find a new transformer that has more power and use it.
  • 8,806
1 vote

Furnace not working after installing nest thermostat

A typical furnace attached to an air conditioner can turn on the blower independently of the furnace. This allows for the blower to be on when used with the air conditioner, and it also allows for &...
1 vote

Furnace not working after installing nest thermostat

Hopefully there are fuses on the control board for the furnace, and hopefully one of them is blown. If you're comfortable opening the case of your unit (after turning off all the power), look around ...
  • 27k
1 vote

How do I add a Google Nest Thermostat upstairs when I already have one downstairs?

Zoning would describe having each thermostat control a separate part of the house. For example, my system has three zones: upstairs, downstairs, and the one that provides hot water; each has its own ...
  • 19.4k
0 votes

How to add Thermostat C Wire to Furnace TH/TR and Transformer

24v transformer and current wiring in pic below That is not the 24V transformer, that is the Gas valve. Keep looking for the 24 V transformer that will give you 24 Volt and the C wire for the ...
  • 8,806
2 votes
Accepted

How to add Thermostat C Wire to Furnace TH/TR and Transformer

The first picture is of the gas valve of your furnace. The white induction winding/coil symbol imprinted represents the gas valve solenoid. The second picture is of the transformer. (If you are ...
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1 vote

What's the proper way for running thermostat wire along heating pipe?

In the end I did something different, so I thought I'd post it. While I think what jay613 said is what most pros do, I can take the extra time to make sure it all lasts. I put pipe insulation around ...
6 votes

Replacing my thermostat: Do I have enough wires?

Thanks for including such a good photo with your question. That makes things much easier. The 4 wires you have available should work just fine for your new thermostat, but you won't have as much ...
  • 4,503
2 votes

Two electric baseboard thermostats on one circuit. The first box has six wires, the second just four (ignoring the grounds)

What you have Black = phase L1 supply in and out Red = phase L2 supply in and out Brown = phase L1 to heater itself Orange = phase L2 to heater itself white box is thermostat. Of course, your colors ...
0 votes

Two electric baseboard thermostats on one circuit. The first box has six wires, the second just four (ignoring the grounds)

This answer is somewhat incomplete because details weren't provided, but 6 wires is likely 3 cables, and you are probably using two-pole stats. One cable is hot from breaker. Wires are opposing 120v ...
1 vote

What's the proper way for running thermostat wire along heating pipe?

Use plastic cable ties to loosely attach your thermostat wire to the bottom of pipes in areas where it's convenient to use the pipes for routing. The 60C temperature rating means a couple of things: ...
  • 23.8k
3 votes

What's the proper way for running thermostat wire along heating pipe?

The electric tape is not good when exposed to elevated temp for long time. The glue on the tape will dry up over time and the tape will not fulfill its function. For this job using simple tie wraps (...
  • 8,806
3 votes
Accepted

How to read wiring diagram of old zoning board

Getting everything to play nice isn't going to be easy Your old zoning board was designed to use a mechanical heat pump thermostat for Zone 1, where both O and B come directly off contacts on the mode ...
3 votes

How to read wiring diagram of old zoning board

This is actually quite common for heat pumps. They run pretty much the same way whether heating or cooling, with one change to switch modes. With only one zone this would not make a lot of sense, ...
0 votes

Honeywell WiFi thermostat jumper loop separate ac and gas furnace

This will not work. You need to pull Common from the AC/air handler, remove the jumper, then connect the baseboard heat (boiler) to Rh and W.

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