HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC

My furnace fan kicks on after reset (or if I force heat on

Customer Question
from thermostat) but heat never...
My furnace fan kicks on after reset (or if I force heat on from thermostat) but heat never kicks in
Submitted: 1 year ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Customer reply replied 1 year ago
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Answered in 56 minutes by:
2/15/2016
HVAC Technician: airheatman, HVAC Technician replied 1 year ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,774
Experience: Furnace, A/C and heat pump specialist.
Verified

You should get an error code on control board in blower compartment indicating what has failed.Can you check and let me know pattern of flashing?

Ask Your Own HVAC Question
Customer reply replied 1 year ago
3 red flashes
Customer reply replied 1 year ago
It is green flashes the Once the blower starts it is 3 red flashes
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK this is telling us the pressure switch is not closing or staying closed.

This could be

caused by a number of problems: faulty inducer, blocked vent pipe, broken

pressure switch hose or faulty pressure switch.

Ask Your Own HVAC Question
Customer reply replied 1 year ago
How do you recommend I determine which? The vent pipe looks in good condition and did not see any blockage from the outside. I also don't hear any clicking on start. And although it sounds like it's burning there is no heat or light from the furnace.
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

1.If pressure switch is open, burners should not be on.

2.First lets make sure the small vent motor is coming on.

3.If so lets try this.

Next I want you to locate the pressure switch. It will be a small round canister with a hose attaching it to the inducer housing. Remove hose from inducer housing and leave it attached to the pressure switch. Power off and back on to reset board again, Then call for heat at thermostat. Allow inducer to start then suck on the end of hose still attached to pressure switch and see if switch will close and burners ignite.

Ask Your Own HVAC Question
Customer reply replied 1 year ago
I hear the small click, but I dont see any ignition.
Customer reply replied 1 year ago
No. I do not see anything glowing
Customer reply replied 1 year ago
Looks in good condition can send a picture if it helps
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

When sucking on hose still attached to switch do you still get error code?

Ask Your Own HVAC Question
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

D you have a meter to verify the switch contacts are closing?Either switch is bad or board is not reading it closed.

Ask Your Own HVAC Question
Customer reply replied 1 year ago
I do which contacts should I check.
Customer reply replied 1 year ago
The switch always seems open if if I try to close it by pulling air our
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

Sentence did not complete. Please explain

Ask Your Own HVAC Question
Customer reply replied 1 year ago
I put a resistance meter across the pressure switchs two terminals after removing the wires from the two terminals. Even when sucking air from the switch I could hear a click but did not see any change in resistance between the terminals.
HVAC Technician: airheatman, HVAC Technician replied 1 year ago

OK looks like pressure switch is the problem You will need to replace it.

Ask Your Own HVAC Question
Ask airheatman Your Own Question
airheatman
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,774
8,774 Satisfied Customers
Experience: Furnace, A/C and heat pump specialist.

airheatman is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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

6,938 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

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

953 satisfied customers

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

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 >

Related HVAC Questions
My 26000 btu heater began with it cutting off ocasionally
Second opinion] my 26000 btu heater began with it cutting off ocasionally now it wont light at all but the pilot will light @ when u release the button it goes out what is my problem. thanks … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
Help me validate my plan to connect two EcoBee 3 Smart
Please help me validate my plan to connect two EcoBee 3 Smart Thermostats to a Honeywell EMM-3 Zone Controller.… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
Trying to connect a new ecobee4 thermostat to my gas
Trying to connect a new ecobee4 thermostat to my gas furnace/AC. The control board shows wires attached to W,R,T,G screws, and the thermostat has connectors to W,R,Y,G. Since I don't have a common wir… read more
airheatman
airheatman
HVAC Technician
8,774 satisfied customers
I have a Goodman furnace model B14933255. I have had issues
i have had issues lately with it. I have replaced both filters, cleaned the flame sensor with steel wool and vacuumed the area within the furnace. it lights up on the 2nd cycle and will stay on for a short while then cycles again and starts again after the 2nd cycle. Sometimes it cycles 3 times and shuts down for appx an hour and the light flashes once. What else should I check or do or replace? Oh by the way i replaced the motherboard about 3-4 years ago. That's not an issue. Please advise … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
Airease nat gas furnace lights but shuts off about 10 sec
airease nat gas furnace lights but shuts off about 10 sec later, a vent blower keeps running and after a minute or so it lights again and keeps cycling in this manner. … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
Question is about the augar motor on a Quadrafire pellet
question is about the augar motor on a Quadrafire pellet stove insert … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
We have a 10 year old well water system with a Buderus
We have a 10 year old well water system with a Buderus indirect fired hot water tank Model S120. We have for some time been getting rust colored hot water. Our cold water was tested by the Penn State … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
My boiler is running low on water every day or so. I see a
My boiler is running low on water every day or so. I see a good deal of steam escaping around the water-level indicator (a vertical glass tube), and I wonder if I have the valves adjusted wrong. … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I have a Lennox lf24-150 that is giving me a 4 flash. It
Hi I have a Lennox lf24-150 that is giving me a 4 flash. It runs perfectly for 2-3 cycles then starts fires but the fan doesn't turn on. Then I get the 4 flash since it is overheating without the fan … read more
airheatman
airheatman
HVAC Technician
8,774 satisfied customers
Sure. I need to reset my Trane Xe90 Furnace. It's on
Sure. I need to reset my Trane Xe90 Furnace. It's on external lockout after failing to light. Happened after I tried switching to a new thermostat. … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Appreciate you helping me. I have a similar issue as to this
Hi, appreciate you helping me. I have a similar issue as to this post where it seems like my Control 4 thermostat is sourcing power from the battery instead of the main power source. If I told you the… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
Xrv95 trane furnace. Power to unit, fuse ok, transformer ok,
xrv95 trane furnace. Power to unit, fuse ok, transformer ok, Circuit breaker ok. Power to furnace. Changed thermostat batteries. Problem is fan will not run even in on position. No heat. No codes, no … read more
Certified HVAC Service Technician
Certified HVAC Service Technician
Welder
Vocational, Technical or Trade School
2 satisfied customers
I have a zvc404-4 and a Honeywell perstige eim that controls
I have a zvc404-4 and a Honeywell perstige eim that controls my heat pump and electric forced air heat. I am trying to connect the taco zone one to the 3rd stage of backup heat on the eim… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I have a GCG-50 water heater in stalled 5 years ago, and the
Hi, I have a GCG-50 water heater in stalled 5 years ago, and the indicator light now flashes 4 times. Heater will not start. … read more
Rick the plumber
Rick the plumber
Owner
9,857 satisfied customers
I. Iam installing a service disconnect to my 240 volts water
iam installing a service disconnect to my 240 volts water hetaer where do i place the earth or ground wire and ther neutral wire,i … read more
David Bowden
David Bowden
Owner
467 satisfied customers
Have a Ac/Heater unit Model RGPS-10EBRJR made 03/2010, the
Have a Ac/Heater unit Model RGPS-10EBRJR made 03/2010, the heater will come on & light, as soon as the blower comes on the flame will go out. it will do this over & over, I can turn the heater off & l… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
It doesn't seem like my newly installed Aprilaire humidifier
It doesn't seem like my newly installed Aprilaire humidifier is working. Shouldn't I hear water draining out the condensation drain? … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,142 satisfied customers
My spa heater isn't working properly and I don't know how to
Hi my spa heater isn't working properly and I don't know how to interpret the codes … read more
David Bowden
David Bowden
Owner
467 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.

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