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I am wanting to switch out my thermostat. I currently have a
I am wanting to switch out my thermostat. I currently have a two wire Honeywell....old mercury model. I would like to install a programable, with wi-fi capabilities. How do I solve the "C" wire dilemm… read more
Rick
Rick
HVAC Supervisor
25,737 satisfied customers
I have two Honeywell thermostats in my condo that are about
I have two Honeywell thermostats in my condo that are about 18 years old. We are renovating our apt and my wife wants to change them to a more modern look. I believe that currently there are four wire… read more
Rick
Rick
HVAC Supervisor
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Replacing my old T874R1822 thermostat with a new Wi-Fi 9000
Replacing my old T874R1822 thermostat with a new Wi-Fi 9000 but would like an old wiring diagram to match the new wires. … read more
Rick
Rick
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I recently purchased a Water Leak and Freeze Detector which
Good morning. I recently purchased a Water Leak and Freeze Detector which I'm not happy with. It keeps going offline. I'm thinking of using a Wi-Fi thermostat with an exterior sensor. Can you tell me … read more
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What wi-fi smart thermostats are compatible with my Carrier
What wi-fi smart thermostats are compatible with my Carrier infinity sytem … read more
airheatman
airheatman
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I removed the old mercury switched thermostat and replaced
Hi, I removed the old mercury switched thermostat and replaced it with a new Honeywell TH4110D programmable thermostat. I only require the heat function to work. There were only two wires red and whit… read more
Rick
Rick
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I am installing a Honeywell Wi-Fi Smart Thermostat,
I am installing a Honeywell Wi-Fi Smart Thermostat, RRTH9580WF, in my house. I have a Trane XL90 Furnace. Where does the blue wire, commonly referred to as the C wire, get connected to the furnace. It… read more
D.E. Anderson
D.E. Anderson
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Do you know if it is possible to replace the Honeywell th9421c1004
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Rick
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I have a Dunkirk PVWB-4D and i am trying to install a new Honeywell
I have a Dunkirk PVWB-4D and i am trying to install a new Honeywell Wi-Fi thermostat (RTH8580WF) On my old mercury dial thermostat i had two wires coming to it, a red and white from the T and TV termi… read more
Tim H.
Tim H.
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Vocational, Technical or Trade Scho
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I have a 6 year old 85% Bryant furnace and humidifier. Tonight
I have a 6 year old 85% Bryant furnace and humidifier. Tonight it began making a loud vacuum/sucking sound we have never heard before. Opening up the humidifier I've found there is a strong wind curra… read more
Phil
Phil
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Degree, Mech Engr Technology
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My Ritetemp 8030C thermostat is easily reset to defaults by
My Ritetemp 8030C thermostat is easily reset to defaults by static electricity. Normally, I just reset the time and use the default settings. This time the temp reading was changed to 28 and it is not… read more
Rick
Rick
HVAC Supervisor
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i am trying to wire a honeywell smart thermostat. my old thermostat
i am trying to wire a honeywell smart thermostat. my old thermostat has 4 wires (no c wire) it also has 2 wires running to a humidifier controller. how should i proceed… read more
Tim H.
Tim H.
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Vocational, Technical or Trade Scho
3,962 satisfied customers
Can I replace my Honeywell T822D1024 used with a boiler unit
Can I replace my Honeywell T822D1024 used with a boiler unit with a new thermostat which can be used with wifi to be controlled remotely? If so, which one should I use?… read more
Rick
Rick
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Im trying to install a new thermostat (Honeywell RTH9590WF1003/U
I'm trying to install a new thermostat (Honeywell RTH9590WF1003/U Wi-Fi Smart Thermostat). I have a Trane XV80 furnace and Trane XL14i heat pump. All the wiring seems straight forward, except there is… read more
Appliance Guru
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I just bought a HW Wi-Fi and am replacing an older White-Rodgers
I just bought a HW Wi-Fi and am replacing an older White-Rodgers mercury bulb. It has an RC and an RH with a jumper wire, but no C wire. It also has a white wire plugged into the W, a green wire in th… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
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hi I just bought a Wi-Fi Honeywell RTH6589WF and try to install
hi I just bought a Wi-Fi Honeywell RTH6589WF and try to install in a very old Empire /White Rogers Type 1E30-916 250 voltage. (open on rise) I only have two black wires coming from the wall. I have be… read more
oilburn62
oilburn62
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I am trying to connect a Honeywell Wi-Fi Touchscreen Programmable
I am trying to connect a Honeywell Wi-Fi Touchscreen Programmable Thermostat to my Amana GUVA090CX50. The old thermostat did not need a C wire, but the new Wi-Fi Thermostat does (for 24vac common). I … read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
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I just bought a thermostat that is wi-fi enabled and requires
I just bought a thermostat that is wi-fi enabled and requires power from the C wire. When I detached my old thermostat, the W, Y, G, and R wires were connected. There were also an orange, a blue, a br… read more
Comfort Specialist
Comfort Specialist
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Tom

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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