Connect one-on-one with a HVAC technician who will answer your question
Expert avatar
Phil, Mechanical Engineer
7,768 satisfied customers
Retired HVAC/ Electrical & Boiler contractor. Industrial
Pearl avatarPearl Wilson, Assistant
2 HVAC Technicians are Online Now

Have HVAC repair questions?

Verified HVAC technicians are available around the clock and ready to answer your question online or by phone. 
Related HVAC questions
When I went to turn on the AC system using the thermostat
When I went to turn on the AC system using the thermostat not the smartphone, the entire screen went blank (black) which means that there is no way to turn on the system. I think that the Honeywell th… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
My air conditioning isn't working. Doesn't seem to be a fuse
My air conditioning isn't working. Doesn't seem to be a fuse problem. … read more
canuck the pro
canuck the pro
296 satisfied customers
Honeywell thermostat RTH7600 replacing old huneywell
Honeywell thermostat RTH7600 replacing old huneywell thermostat. Old thermostat had W,Y,G,C,R and Rc. Wires were connected to W and R. Controlling steam boiler. New Thermostat has C,G,Y,W,Rc,R,W2,Y2. … read more
Rick
Rick
Owner
9,857 satisfied customers
Have a three zone system with an older Honeywell TZ-3
Have a three zone system with an older Honeywell TZ-3 controller. Want to replace two of three older Honeywell non-wifi, non-programmable thermostats with Nest-E. Current wires to thermostats are WRYG… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,768 satisfied customers
Sorry, I have a birthday phone call from our grandson, and
Sorry, I have a birthday phone call from our grandson, and will call you back in a bit. … read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
On central air system, evaporator coil iced up. Trane. All
On central air system, evaporator coil iced up. Trane … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I have a Trane GECA PTAC and want to install a Nest to the
I have a Trane GECA PTAC and want to install a Nest to the unit - current unit doesn't have a digital thermostat and only has a dial-style thermostat (knob with red/blue). Model: GECA01201G01BS00D1000… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,768 satisfied customers
Billy, I've asked you questions before and you've been very
Hello again Billy, I've asked you questions before and you've been very patient and helpful. That's why I'm requesting you again. This is another question about a house that was built in 1966...I am h… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Bill, I bought an older Empire vented wall heater, I had to
Hi Bill, I bought an older Empire vented wall heater, I had to switch it to propane, so I got that kit, had a handy man install it, the original thermostat wouldn't work so we would put the two wires … read more
Rick
Rick
Owner
9,857 satisfied customers
Need operating manual or instructios for my home thermostat,
need operating manual or instructios for my home thermostat, a TH6110D1005, a focus programmable … read more
Rick
Rick
Owner
9,857 satisfied customers
FYI, had same i da sue with my 4t raheem. I inserted a 5a
FYI, had same i da sue with my 4t raheem. I inserted a 5a fuse in place of 3a. Had no 3 around shop. So we are working so far. But my question is the circuit board is flashing now red 16 times than po… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
Have an old Lennox thermostat, just had wall painted and
Have an old Lennox thermostat, just had wall painted and removed the thermostat. Now putting it back can't get it to work properly. 5 wires coming out of wall - red, white, green, yellow and blue.Blue… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Regarding the c wire issue and the RTH6500 thermostat. I
Second opinion] regarding the c wire issue and the RTH6500 thermostat. I notice on my existing thermostat wiring there is a terminal marked "RC" with two wires. One of the two wires goes back to the l… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I purchased a GE dehumidifer about 2 years ago from home
hi Pearl - I purchased a GE dehumidifer about 2 years ago from home depot. It was working perfectly fine until about 2 weeks ago. After I cleaned the filter and put the filter back in correctly, it do… read more
Twa252842
Twa252842
Handyman / Owner Operator
Vocational, Technical or Trade School
99 satisfied customers
I just purchased a Honeywell programable thermostat #
I just purchased a Honeywell programable thermostat # RTH241OB and the wire connections do not totally match my old one so I need assistance … read more
Rick
Rick
Owner
9,857 satisfied customers
Thanks in advance for your time - I am installing an Ecobee3
Thanks in advance for your time - I am installing an Ecobee3 Lite thermostat and i have an Aquastat Relay Type L8148E … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,768 satisfied customers
I have lennox system with a communicating thermostat, 49w95.
I have lennox system with a communicating thermostat, 49w95. It has 4 pins marked R, i+, i-, and C. My ac will run but it cuts off after a few minutes. When it cuts off, the thermostat, a touch screen… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I'm hooking up a transformerbto my furnace. The wires are
I'm hooking up a transformerbto my furnace. The wires are yellow and yellow/white, the wires coming from thermostat zone valves are red and white I don't no which to hop to which … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
7,768 satisfied customers

How to get help with HVAC questions


Some examples of customer concerns addressed by the HVAC Experts on JustAnswer include:


  • Why does my furnace not kick on when the thermostat is set to a temperature above the ambient temperature of the room?
  • What would you suggest as a replacement brand and tonnage for my York heat pump’s outside unit?
  • My Bryant 90 Plus furnace is not heating. The exhaust fan comes on and goes off, but the furnace does not ignite.
  • How do I remove a thermostat schedule and return it to manual mode?

Before reaching out for HVAC assistance, be prepare to answer these questions:


  • What are the issues you’re experiencing
  • Have you confirmed that the fault isn’t in your thermostat settings?
  • Have you changed your filters recently?
  • Do you intend to do the job yourself?

Keeping these questions in mind will save you valuable time as you seek the resolution you need.