HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Connect one-on-one with {0} who will answer your question

Related HVAC Questions
Helping an elderly neighbor with a 50-yr old Dayton 3E369
Helping an elderly neighbor with a 50-yr old Dayton 3E369 garage gas heater. Changing the ICU from Johnson G60QBG-1 to Robertshaw 780-715U but the wiring was disconnected and therefore confusing.… read more
Twa252842
Twa252842
Handyman / Owner Operator
Vocational, Technical or Trade School
1,078 satisfied customers
I have a teledyne laars boiler furnace with a Honeywell S86F
I have a teledyne laars boiler furnace with a Honeywell S86F intermittent pilot. The pilot lights for several seconds and then goes out and continues this process . I'm not getting 24 vac to the MV te… read more
Rick
Rick
Supervisor
36,856 satisfied customers
I have a lennox conservator 3 g16. I had to replace the
I have a lennox conservator 3 g16. I had to replace the flame sensor. Did so. Well when I was taking it out I unplugged it from the Robertshaw 780-745 (ignition control?). When I did so I also acciden… read more
BillyHvac
BillyHvac
Journeyman Service Technician/Inspector
State Licensed Mechanical Contractor
16,806 satisfied customers
Billy. Troubleshooting my Armstrong furnace with a VR8204H1097
Billy. Troubleshooting my Armstrong furnace with a VR8204H1097 valve. Pilot on, inducer on and 24v at the inducer. No main burner on. Have 24v at the PV and the MV leads to the valve. No voltage on th… read more
BillyHvac
BillyHvac
Journeyman Service Technician/Inspector
State Licensed Mechanical Contractor
16,806 satisfied customers
hello my name is ***** ***** using Just Answer..... Problem:
hello my name is ***** ***** using Just Answer..... Problem: - THE MAIN BURNERS WILL NOT LIGHT - multi-meter only reads 12 to 13 Volts AC across MV and PV/MV - furnace is a Lennox Whisper Heat G2003/4… read more
Appliance Guru
Appliance Guru
23,641 satisfied customers
G20 with 2yr. old Honeywell ignit. control. Pilot on, no main
G20 with 2yr. old Honeywell ignit. control. Pilot on, no main burners on, fan on for cycle then retry. 2 blink code.… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
Have RUUD Model 80 Plus that cycles on with the burners lit
Have RUUD Model 80 Plus that cycles on with the burners lit for 20 to 25 seconds and then off with about a 1 minute cycle so the furnance air never gets very warm. It has a Robertshaw 780-715U ignitio… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have aRobertshaw 780-715U ignition control that I just replaced.
I have aRobertshaw 780-715U ignition control that I just replaced. Seems that the new one is doing the same thing that the old one did. It turns on the spark, turns on the pilot valve and lights off. … read more
Appliance Guru
Appliance Guru
23,641 satisfied customers
I have a Lennox g16q4x-75-5 furnace. The pilot light is on,
I have a Lennox g16q4x-75-5 furnace. The pilot light is on, and I can hear clicking, but the burner tubes won't ignite. My reserach indictes that I should try cleaning the sensor, which I believe I've… read more
Matthew
Matthew
Service tech
Bachelor's Degree
2,014 satisfied customers
Hi, I would like to know the location of the flame sensor for
Hi, I would like to know the location of the flame sensor for my Rheem home heating unit. Model #RGLC-06NC-ER Serial #GN4D204F1086 1867. The furnace ignites but goes off after about 15 to 20 second.… read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
772 satisfied customers
Heil model NUGK075DG07 gas furnace Troubleshooting
Troubleshooting Heil model NUGK075DG07 gas furnace. Fan, exhaust blower, interlocks: flue temp, rollout, fan control, pressure switch all test ok. Igniter comes on, ignites puff of gas, then goes out.… read more
Douglas
Douglas
Vocational, Technical or Trade Scho
3,129 satisfied customers
where can i obtain a troubleshooting manual for a robert shaw
where can i obtain a troubleshooting manual for a robert shaw 780-715-U ? I have one that fires my propane torches and the pilot light won't come on. I need to trouble shoot to see if it's the control… read more
BillyHvac
BillyHvac
Journeyman Service Technician/Inspector
State Licensed Mechanical Contractor
16,806 satisfied customers
91 50gal Conservationest w/ Robertshaw contol Q Do the
'91 50gal "Conservationest" w/ Robertshaw contol Q: Do the MV & PV solenoid coils require a DC voltage f/ the control to hold in the valve (open)? The drawing indicates polarity. 24Vac f/ the sec. of … read more
Heath Moyer
Heath Moyer
1,071 satisfied customers
I am replacing a Honeywell S8600M Ignition Control on a Rheem
I am replacing a Honeywell S8600M Ignition Control on a Rheem Power Vent hot water heater with a Robertshaw HS780 17NL-304A Ignition Control and the wiring terminals are different and I cannot find a … read more
THEFIXER1966
THEFIXER1966
High School or GED
14 satisfied customers
I have a Gas Furnace with an automatic pilot and a white-rodgers
I have a Gas Furnace with an automatic pilot and a white-rodgers 1F80-261 thermostat. The pilot comes on when heat is called for but burners do not come on. Once or twice burners did operate two weeks… read more
BillyHvac
BillyHvac
Journeyman Service Technician/Inspector
State Licensed Mechanical Contractor
16,806 satisfied customers
ignition control unit model sp715/usi 715u pilot light works
ignition control unit model sp715/usi 715u pilot light works ok,i clean the flame sensor but burner will not lite. Do i need a new ignition control ?… read more
Matthew
Matthew
Service tech
Bachelor's Degree
2,014 satisfied customers
Hello, Im replacing a Robertshaw sp715A with the Robertshaw
Hello, I'm replacing a Robertshaw sp715A with the Robertshaw HS780 34PL-308A... Some of the termianls are different and I have no instructions with the new uint. I tested the furnace with a working sp… read more
BillyHvac
BillyHvac
Journeyman Service Technician/Inspector
State Licensed Mechanical Contractor
16,806 satisfied customers
Three days ago my furnace stopped working on a repo I just
Three days ago my furnace stopped working on a repo I just bought. The pilot light would light without a hitch, main burner would light, then after 5 seconds turn off and start all over again. I repla… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,216 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:

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

1,029 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.

Jerry

Jerry

Service Technician

576 satisfied customers

HVAC Technician. Hearth Products Specialty

A-1 Tech

A-1 Tech

Service Manager

526 satisfied customers

I have been in the HVAC business for over 40 years.

Thehvacguy

Thehvacguy

LIC HVAC,Plumber

426 satisfied customers

Certified HVAC Universal Technician,Lic plumbing contractor, 28 yrs exp

Drcool

Drcool

HVAC Technician

348 satisfied customers

i have been an A/C tech for the past 30 Years. working on window types, split type, and package

N4IEA

N4IEA

NATE Certified; HVAC Technician

227 satisfied customers

Retired, HVAC / Electrical Technician / Contractor 35-years Experience.

< 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