All Questions
Tagged with electrical thermostat
199
questions
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thermostat connections with different size wires
my current thermostat has 14 gauge wires connected to it and the wires are supplying 24 volts to the thermostat. i want to get a new thermostat but will need 18 gauge wires. since the voltage from the ...
1
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1
answer
6k
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Where is the C wire terminal on my boiler
I am trying to connect the T5+ smart thermostat to my oil based furnace. I see there are only two used wires at the thermostat R And W but 3 additional cores available. My boiler is a old Weil McLain ...
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3
answers
7k
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Making sure old Honeywell Thermostat (round dial) doesn't turn on
I've had to cover my baseboard heater with painter's tape and duct tape because I keep getting click beetles strolling into my apartment after 6pm (I live in Michigan, and the temps are dropping).
I ...
3
votes
2
answers
4k
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Why my baseboard heater won’t turn with new thermostat?
I have a pair of electromod basement heater. The label on each of them show them show 750/1000W. Power supply to this is 240V
I am trying to replace the old manual thermostat with a progrmabale one. ...
1
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2
answers
2k
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Ecobee 3 lite Installation -- Confusion about C wire (on furnace but not at thermostat)
I am about to install the Ecobee 3 lite thermostat. On the thermostat end, there is no C wire - just the typical 4 wires - R,Y,W,...
On the furnace end though, there is white C wire too, which I do ...
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1
answer
68
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Temperature monitoring for storage hot water system (RP-2 connection)
My HWS has a secondary outlet connection I don't use, and I'd like to use it to install a thermal probe I can monitor.
HWS RP ¾ / 20 temp probe?
Does anyone know of a practical way to install a ...
1
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1
answer
5k
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Where to connect c wire in furnace?
I'm trying to figure out where to connect a C wire from a thermostat to my furnace. I found this old post for the same furnace type (Trane XE70), but it seems as though a red wire goes to the terminal ...
2
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1
answer
8k
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How to Wire 3 baseboard Heaters with 2 Thermostats
I have one 20 amp double pole circuit that I am planning to run 3 baseboard heaters on with 2 line voltage thermostats. I have already made sure the watt consumption for the 3 heaters will not exceed ...
1
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1
answer
1k
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Wiring a new thermostat without a C wire, extra wires from furnace
I have checked other posts regarding this and don't see a solution yet.
I have purchased a new thermostat that requires a c wire. My old thermostat's c wire didn't work so I went ahead and added a ...
2
votes
2
answers
180
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Is this line voltage thermostat sufficient?
I'm replacing a bad Aube line voltage thermostat for my electric baseboard heaters. I liked the model, so I purchased what I thought was the same one - however I missed a letter in the model. What I ...
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2
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6k
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Can 1 24v transformer support 2 smart thermostats.
I replaced my old thermostat with a lyric. My doorbell transformed was unused and 16 V. I replaced that with a 24 and wired it directly to my lyric. Everything works great.
If I do an additional ...
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2
answers
9k
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Electric baseboard heaters stuck on with digital thermostat
I have two electric baseboard heaters in my house that are both controlled by a single digital programmable thermostat (King ESP-230). I believe each heater is 1500w so 3000w total. Twice now in the ...
0
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1
answer
9k
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Installing Nest 3rd generation thermostat from Old Trane Weathertron Thermostat (Mercury one) [closed]
Nest is not detecting Power (Rh) Showing error that power is not connected. Please help.
Installing Nest 3rd generation thermostat from Old Trane Weathertron Thermostat (Mercury one)
New stat wiring:...
1
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1
answer
162
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Is a 4000W line voltage thermostat sufficient here?
I want to upgrade a baseboard electric thermostat to a programmable. The existing digital, non-programmable thermostat is rated for 22A (5280W) (made by PSG). The only programmables I can find max out ...
1
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1
answer
56
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Can a Thermostat Common Wire (C-Wire) Be Added to a DNV40NB Heater?
During recent renovations, we had to move our existing thermostat. Instead of replacing it with the same dumb 2-wire knob (white/red), I'd like to get a smart thermostat like the ecobee3. All of these ...
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4
answers
1k
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Thermostatic Control of Simple Apartment Heater
My daughter's apartment has a very simple heater. As shown in the pictures below, it is an heater-coil unit with only a fan control. There is no temperature control or thermostatic feedback. So, for ...
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2
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1k
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Box Fill for Line Voltage Thermostat
I know that normally a receptacle or device in the gang box counts as 2 conductor volumes. Does a line voltage thermostat just count the same as any other device? I'm replacing an old mechanical 240V ...
2
votes
1
answer
17k
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Ecobee3 not turning on heat, but fan is on
I have an Ecobee3 that has been successfully working (both heat, fan, and AC) for the past 6 months. Recently I was trying to get my humidifier working so I was playing around with some wires, which ...
1
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1
answer
573
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C Wire for Thermostat
I am upgrading my thermostat (Have AC & Heat) and found that it doesn't have the "C" wire that I need to power my new thermostat. The furnace does have a terminal for C, but only condensation pump ...
1
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1
answer
669
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Installing a Hive Thermostat [closed]
I purchased a HIVE thermostat and want some assurance before I go about installing this.
First of all i was wondering where to put the receiver as I thought it would just replace one of the ...
1
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1
answer
607
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Replacing old mechanical line voltage thermostat with Caleo from Casa Connect
------ Update ------
I followed the instructions from Casa: I made A1 go into the new thermostat and then out into the blacks of B1 and C1 (see my diagram of the old setup below). Then I connected A2 ...
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1
answer
1k
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Installing thermostat but can't disconnect power
I just bought a house, and I'm trying to save some money by doing simple projects, on my own. I just purchased a smart thermostat and I am trying to follow the directions, for installation. The ...
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1
answer
9k
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Locating HVAC Breaker To Replace Thermostat
I'm looking to install a smart thermostat in a single family home built in 1997 (southern California). My issue is that I cant seem to locate the breaker for the HVAC equipment. I was only able to ...
3
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2
answers
847
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Please help me understand my HVAC wiring
I'm trying to replace an old thermostat with a WiFi one that requires a C wire to power it. When I opened the panel on the air handler 1 (where I'd like to connect the thermostat to), there's no wire ...
2
votes
1
answer
232
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New thermostat: How to wire it?
My old air conditioner thermostat broke down, so I bought a new one. But when it arrived, I was horrified to discover that the terminal of the wires were not named the same.
Both thermostats have ...
2
votes
1
answer
3k
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Using 15-amp thermostat on a 20 amp circuit
I live in Washington state. I have a 20 amp circuit breaker on a circuit that drives two fan-forced heaters, connected through a single line voltage "dumb" thermostat, unknown rating. I would like to ...
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2
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1k
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Max Current Supplied by Thermostat Wire
So I want to run a Raspberry Pi 3 off of thermostat wire. My question is, will the thermostat wire supply enough current for the raspberry pi (2.5 amps)?
1
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2
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4k
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Why does hot air from my fan heater stop after 4 to 7 seconds?
Product: Challenge fan heater: model E9907R-N -- 230-240V -- 50 Hz -- 2750-3000W.
While off, something fell through the grid.
I opened the fan heater to remove it.
It now doesn't blow hot air (...
2
votes
2
answers
282
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Forgot to unplug fridge while replacing thermostat, smelled electrical burning
I went to replace the fridge thermostat today. I unscrewed the housing found the cables popped out the metal thermostat from the plastic casing.
I should have stopped to unplug the fridge here since ...
0
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2
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2k
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Can I add Suntouch floor thermostat to 20 amp breaker circuit with in-line GFCI outlets
I have a dedicated 20 amp breaker that feeds a dedicated circuit for all the GFCI outlets in the bathroom (5). I also have a SunTouch floor thermostat attached to a warming pad under the floor that ...
3
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1
answer
5k
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Why won't my Central Heating Boiler turn off with Nest thermostat installed?
I bought a second hand Nest Thermostat v1 (the European model with heatlink). I installed it and the Thermostat seems to work. The central heating boiler (Vaillant hrPRO CW3 VHR NL CW 3/3) seems to ...
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3
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300
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Use 110 thermostat for 220?
I wish to change my greenhouse fan from a 110 unit to 220. I have the fan. The price was right. It was free. The 220 is available. Is there a way to use the 110v thermostat to power a switch (or ...
0
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1
answer
259
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A/C Electric Blower Motor issue
My A/C system uses an electric furnace blower motor for heating and cooling. The motor jerks violently when cycling off when the thermostat is set on auto for cooling. The motor was recently replaced ...
2
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3
answers
28k
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Before replacing a thermostat, is it enough to unplug the furnace?
We have a thermostat that we need to replace. Our system is I think pretty typical, the thermostat I think controls the furnace and fan, and I suppose the furnace relays controls for the air ...
1
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1
answer
982
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Install Common Wire (unable to find terminal or 24 VAC)
I bought a Nest 3rd Generation Thermostat. Live in a 2 family home, where my floor/basement has the boiler room/furnace. I have a Laars Mini Therm Furnace Model JVT. There's a thermostat upstairs as ...
2
votes
1
answer
2k
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Installation Ecobee3 Smart Thermostat Confusion
So Ecobee' website says my configuration is compatible but after looking at my wires (Im not an AC guy) I have lots of questions as the wiring doesnt just align perfectly. Im assuming because my unit ...
1
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2
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127
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Electrical problems
We are renting a 3000 foot sq home built in 1979, we have many electrical concerns.
Overview
At least two or more outlets in every room do not work, or there is only one receptacle working. So you ...
3
votes
1
answer
5k
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Can I use a separate 24V transformer with an Ecobee 3 and an Aube relay?
I've purchased an Ecobee 3 Lite smart thermostat which requires 3.5 VA to operate but I'm using an Aube RC840T-240 electric heating relay with 24 V transformer which only provides 1.2 VA.
Can I ...
1
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2
answers
6k
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Any suggestions for incorrectly-wired thermostat?
I foolishly got myself into this mess. Any suggestions?
1923 house with original steam heat (gas). The addition (~1998), has hot water (baseboards). I tried to replace the addition's thermostat, and ...
2
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1
answer
4k
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Add c wire to furnace for smart thermostat
I have an older furnace and am looking to add a c wire for a smart thermostat. Currently behind my thermostat I have red/black wire, however, there are 3 additional wires that are not connected.
At ...
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1
answer
1k
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Install New Lyric T5 on second AC, first one went great, this ones confusing, help!
Ive got 2 thermostats hooked up to 2 heat pump style AC units at my house. Over the weekend I impressed myself and installed a Lyric thermostat to replace a broken thermostat (on the inside of my ...
-1
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1
answer
891
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Using Nest to control water cooled A/C with reverse cycle heat
I would like to use nest to control a "Marine Air Systems Vector" with Mechanical controls. I have an idea using Honeywell relay(s). Please review the wiring diagram attached and provide any ...
2
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3
answers
14k
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thermostat causing heating element to click on and off repeatedly
I have an electric heater central air/heat system with a standard thermostat. I have replaced the thermostat with no change (that was some time ago), so I believe it's not the thermostat causing the ...
-1
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1
answer
6k
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Does it matter which 24v line I use to splice a common wire from?
I have a RayPak boiler that currently has a W and R wire only. In wall i have a 5 connector thermostat cable so I have three extra wires I can connect to.
I'm a little unclear if it matters if i ...
2
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1
answer
138
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I'm not sure what kind of thermostat I can use -- two wires, red/beige? and a millivolt thermostat
I've been wanting to upgrade my thermostat to a smart one -- I only have an in-floor furnace, so the utility isn't super necessary, but I'd like to have a smart thermostat anyway (so I can turn my ...
0
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1
answer
65
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Install in a series - Electric heating thermostats, wireless communicating, 3000W for an Manufactured home/RV
The instructions on the Sinopé GT125-K2 Starter states, "the thermostat must be installed in series". A series meaning the "L1" (hot line in) connects to another outlet on a circuit line? What risks ...
0
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1
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11k
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Electrical Outlet - Red and black wire to L1 T1
Background: I removed an in line wall heater thermostat from a 120v outlet, and want to ensure I reconnect the wires accurately.
Question: A google search hit insists the wire marked in red is ...
1
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2
answers
274
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Smart wall heater thermostat line voltage from high to low.
Cadet's blog provided an approach on connecting a smart thermostat to a Com-Pak wall heater by connecting it to a relay/transformer. They have recently updated and changed their post to not recommend ...
0
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1
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5k
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How to find the right thermostat for my gas fireplace?
I have a Superior SSDVR3530CNM gas fireplace, which I'm trying to find a proper thermostat for.
The manual recommends this one:
However, it doesn't seem like they are sold anymore. (Or I'm not ...
1
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0
answers
390
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Installing new thermostat without a C wire. Can I use my heater/R wire instead? Random 13V as well
I'm installing a thermostat, but I don't appear to have a C wire. My old thermostat had R/RH,Y,G,and W. It's an AC system that was setup before I got here. The actual AC unit is a long way away and ...