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My thermostat is showing Err 52. What does this mean and how
My thermostat is showing Err 52. What does this mean and how can I fix it? … read more
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Not a HVAC question.Question is on the RCT 8200 thermostat
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I have a Honeywell thermostat controlling a propane fired York
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Good evening Scott, Err code on Honeywell THM5421C reads "53"
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In August of this year, I purchased a Bryant High Efficiency
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airheatman
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I have the same problem with one of my customers systems. First
I have the same problem with one of my customers systems. First it was err 126 and the tech support guy said to restore settings or something I forgot exactly what it says. Next day it gives me err 12… read more
gotoman for ac
gotoman for ac
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I have a Honeywell TH9421103 programmable thermostat. It runs
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no heat from our dining room Honeywell thermostat our honeywell
no heat from our dining room Honeywell thermostat our honeywell thermostat shows err 53 & 93 i have checked the breaker No battery i have blown air into the inside of thermostat ***still not working… read more
airheatman
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Just installed a VISIONPRO IAQ and I am getting a err 89
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Tim H.
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I live in Surprise, AZ and it is currently 104 degrees outside,
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Error code 53 on Honeywell thermostat. What does it mean?
I have a Honeywell VisionPro IAQ "thermostat". It is blinking error code 53, what does that mean? Prior to the error code, the external thermometer was reading 127 degrees, it is in the low 70's… read more
BillyHvac
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My system sounds like it is running, but the thermostat
My system sounds like it is running, but the thermostat (900) says Err 18 and the red light is on at the top right of the thermostat. We don't know what the error message means and can't find anything… read more
Tim H.
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I have a dual fuel furnace, fuel pump + propane....we ran out
I have a dual fuel furnace, fuel pump + propane....we ran out of propane in a cold spell...finally got my tank filled, thermostat was running when I got home, now am getting a "Permanent Hold" message… read more
Rick Mather
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I have a Lennox Elite series thermostat with a heat pump. The
I have a Lennox Elite series thermostat with a heat pump. The heat pump operates until the temp reads below 40 degrees. that is too low, when the outside temp is 40-43 degrees the house won't heat up … read more
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Meet the Experts:

Phil

Phil

Mechanical Engineer

7,634 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

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35 years experience, HVAC

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Matthew

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Brian HVAC Guy

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Kenton Guidry

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Rick Ridley

Rick Ridley

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Tom

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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