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Hooked nest thermostat up and now nothing works. I turned
hooked nest thermostat up and now nothing works. I turned off the a/c but I did ot turn off the furnace. Is there a fuse that is blown somewhere? … read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
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Last night our upstairs unit was blowing air but it wasn't
Last night our upstairs unit was blowing air but it wasn't cooling. At 4:00, temp was 77 and schedule was set to 73. At 7:30 pm temp was 82 and schedule was set to 74. We turned the system off complet… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
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Air Ease Tech furnace model em1p48cg-1 not heating. Thermo
Air Ease Tech furnace model em1p48cg-1 not heating. … read more
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Phil
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My furnace motor makes a thunk sound and does not turn on. I
my furnace motor makes a thunk sound and does not turn on … read more
airheatman
airheatman
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The unit will not stay burning for only about 10 to 20 sec.
The unit will not stay burning for only about 10 to 20 sec. When setting the thermostat to call for more heat, will not stay at desired temp setting only to fall back to room temp. … read more
Rick
Rick
Supervisor
25,217 satisfied customers
I have a Lennox C33-30B-2F which is running but not heating.
I have a Lennox C33-30B-2F which is running but not heating. the diagnostic code is A) Primary or secondary limit switch open or B) Watchguard mode-limit switch open longer than 3 minutes. Is there so… read more
airheatman
airheatman
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Can I wire the W(heat) to the G(Blower) on the thermostat
Can I wire the W(heat) to the G(Blower) on the thermostat with the Fan mode set to Auto? Will the blower be called to activate based on the temp or is it called on the board from the W(heat) activatin… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
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I have a Lennox C33-30B-2F. The combustion air inducer motor
I have a Lennox C33-30B-2F. The combustion air inducer motor is not getting power to it. When should it be running.… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,929 satisfied customers
Checked drain lines before turning on furnace at thermostat
Checked drain lines before turning on furnace at thermostat and they were open. Turned heat on and furnace fired and is running at present. The thermostat has made a clicking sound approx. three times… read more
ClimateCreator
ClimateCreator
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I have a Lennox G43UF-36B-070-08 gas furnace. It is 4 years
I have a Lennox G43UF-36B-070-08 gas furnace. It is 4 years old. I just found that when I turn it on, it ignites, the blue flames come on then shuts off after 3 seconds. The blower stays on and the li… read more
KenCan
KenCan
Vocational, Technical or Trade Scho
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I am having problems wiring a Honeywell TrueIAQ humidistat
I am having problems wiring a Honeywell TrueIAQ humidistat with an HE265 bypass humidifier and a Lennox G43UF-36B-070-08 HVAC Unit. I have the wires connected as directed. I have water running to the … read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
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problem. have a honeywell thermostat. temp is set at 66 degrees
problem. have a honeywell thermostat. temp is set at 66 degrees with fan on automatic. actual temp on thermostat is 63 and falling. furnace flame is lit and constantly comes on and off all day. the th… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,791 satisfied customers
I have a lennox elite furnace. It is running but not heating
I have a lennox elite furnace. It is running but not heating up to temp. It stays at about 60 degrees and we have the thermostat set at 70. The filter is new. I am told that there is a drain hose I sh… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,929 satisfied customers
I have a Lennox 10ACC airconditioner and a C33-30B-2F-2 unit
I have a Lennox 10ACC airconditioner and a C33-30B-2F-2 unit inside. The blower seems to come on at a low setting at times and a higher setting at other times. During the day (when it's hot out) the b… read more
Matthew
Matthew
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Bachelor's Degree
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I have a 4 year old furnace with a lennox 78m4701 circuit
I have a 4 year old furnace with a lennox 78m4701 circuit board. The heater will start up and run for about 5 minutes (fast blinking red and green then red goes out and the green fast flashes) then tu… read more
Regan Land
Regan Land
General Manager
Vocational, Technical or Trade Scho
768 satisfied customers
We have a Lennox furnace Model #G51MP-36B-070 where we would
We have a Lennox furnace Model #G51MP-36B-070 where we would like to interlock a 110volt motorized fresh air damper to open when the furnace is running in any of the thermostat modes of Heat / Air con… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,929 satisfied customers
I have an amana heater that was installed with our air conditioner
I have an amana heater that was installed with our air conditioner a couple years ago and now it seems to be having issues. When its in the auto setting the blower stays on and the heat sensor ( i ass… read more
Mark Henley
Mark Henley
HVAC Controls DDC
3,216 satisfied customers
Hi! We have a Bryant model FB4ANF042. Its about 12 or 13
Hi! We have a Bryant model FB4ANF042. It's about 12 or 13 yrs old. We have it serviced annually. We change the filter on the 1st of the month. We live in Florida, so this isn't an issue very often, bu… read more
Tom Goellner
Tom Goellner
owner
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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

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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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