HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

Related HVAC Questions
Honeywell Prestige THX9321/9421 Thermostat screen went black
Honeywell Prestige THX9321/9421 Thermostat screen went black due to power outages and I can't get it back on.Circuit breaker & furnace power switch are on and furnace door is secured. Help! … read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
7,807 satisfied customers
I have a programmable thermostat and we had power outage.
I have a programmable thermostat and we had power outage. Now the power came on and the "System" button still shows off and I cant get to change to "on" it's a white Roger's thermostat … read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
7,807 satisfied customers
Just tried to replace my thermostat and turned the AC
Just tried to replace my thermostat and turned the AC breaker off but failed to see that there was an extra "heat" breaker. Installed the new thermostat but nothing kicked back on. I am almost sure th… read more
Gaztech
Gaztech
HVAC Technician
963 satisfied customers
I have a York Diamond 80 furnace, part P4hub16n08001a, that
I have a York Diamond 80 furnace, part P4hub16n08001a, that showed a blank (off) thermostat after a power outage yesterday. … read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,887 satisfied customers
Can the AC run if a thermostat is blank and the switch with
Can the AC run if a white Rogers thermostat is blank and the switch with gas on one side and electric on the other is in the middle, which would appear to be the unmarked off position? … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
5,362 satisfied customers
ComfortLink™ II XL850 thermostat doesn't automatically reset
ComfortLink™ II XL850 thermostat doesn't automatically reset after a power outage. The screen just goes blank/white … read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
768 satisfied customers
I have a carrier a/c. After a short power outage this
I have a carrier a/c. After a short power outage this morning, my a/c won't come on. The thermostat seems to be stuck. There is a display, but it can't be changed. … read more
Michael Ferryman
Michael Ferryman
110 satisfied customers
Honeywell TH8320ZW installed with AT&T Digital life system.
Honeywell TH8320ZW installed with AT&T Digital life system. Has worked fine for 2+ yrs. Screen shuts off/blank/no power. Check button bat. 3.3v. It powers randomly. Set date and time. Runs fine for ab… read more
D.E. Anderson
D.E. Anderson
Industrial Refrigeration Service Manager
200 satisfied customers
Two units, two problems. Downstairs unit showing OVERIDE
Two units, two problems. Downstairs unit showing OVERIDE flashing and EMER HEAT PUMP lit on Ritetemp 8050C. Not heating....reset and is heating but still showing same codes. Upstairs unit not shutting… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
7,807 satisfied customers
I am an electrical contractor and am having trouble with my
I am an electrical contractor and am having trouble with my Armstrong electric heat pump. When we turn thermostat to cold the unit comes on and puts out cold air but only for a few min. and then the o… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,887 satisfied customers
We experienced a short power outage bec. of the storm. On return
We experienced a short power outage bec. of the storm. On return of the electric power,one of my two Honeywell programmable thermostats just has a blank yellow green screen and not responding to touch… read more
Douglas
Douglas
Vocational, Technical or Trade Scho
3,087 satisfied customers
Hi, I have a Goodman model HPTD18-60 the current room temp
Hi, I have a Goodman model HPTD18-60 the current room temp is window is blank. but the desired room temp setting is on 40. I took the unit off the wall and pressed the reset the only thing that happen… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
7,807 satisfied customers
hi, we just got home from vacation and it is 100 degrees outside
hi, we just got home from vacation and it is 100 degrees outside and our a/c was working for about 30 min and has now just shut off. the screen is blank, and it is not even on. our electricity is work… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,791 satisfied customers
My Carrier Infinity Thermostat shows a blank light screen
My Carrier Infinity Thermostat shows a blank light screen. What might the problem(s) be? I tried to reset with the Left button but there was no change.… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
we have a honeywell T8411R 1002 (2) thermostat and we tried
we have a honeywell T8411R 1002 (2) thermostat and we tried to turn on the heat but it would not turn on. when we first looked at the thermostat it was blank, we pulled it out from it's housing and pl… read more
Tom
Tom
HVAC Technician
Vocational, Technical or Trade Scho
770 satisfied customers
I am replacing a robert shaw sb4a-5aj thermostat with a totaline
I am replacing a robert shaw sb4a-5aj thermostat with a totaline p474-0100. The wire colors I have in the wall are red (connected to R), green (connected to G), cream (which came off of W) and black (… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,887 satisfied customers
i have a 2 year old carrier, and today my upstairs thermostat
i have a 2 year old carrier, and today my upstairs thermostat went blank, then later this evening,my downstairs thermostat only show green. what could make both units go off on same day… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
5,362 satisfied customers
I have an old Carrier furnace with a new Honeywell Thermostat.RTH6300. At
I have an old Carrier furnace with a new Honeywell Thermostat.RTH6300. At times it won't start when the set temperature is higher than the rm temp. I have changed the programmed settings to HOLD at 74… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,887 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Phil

Phil

Mechanical Engineer

7,791 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

1,024 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x