Why do neither my heater or air con work?

Asked by Aug 22, 2016 at 10:45 AM about the 2006 Honda Civic

Question type: Maintenance & Repair

My heater blows  cool air and the air con blows warm air. I can set the
temperature to 25 deg but it is still cold in the car. Would like to get this fixed
before winter.

1 Answer

23,725

Without seeing the condition of the car, it's hard to make specific suggestions on what you should do. I'd start by first checking the coolant level, as that will affect the heater core. If levels are good, let the engine warm up to temperature, then check the heater hoses, they should be warm/hot, and pressurized. If not you may have a blockage in the heater core (this is also assuming the engine's cooling system is working as normal). If it seems as though the heater core should be getting hot but isn't blowing hot air, then check that you don't have a "temperature blend door" stuck open to the AC evap coil. Blend doors are plastic flaps that direct incoming air from the blower motor fan across either the heater core OR the AC evap coil. A small actuator moves it based on your temp selection. Move the temp selector, you may be able to hear the door swinging and/or slight pressure change in the incoming air. Then you have to consider the non-working AC. That can be from any number of causes, from loss of refrigerant (needing a recharge) to a non-working compressor or some as yet-to-be determined problem. Don't waste your time/money on those "AC Pro" recharge kits, go to an AC repair shop and have them diagnose your heater/AC problem.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Why is my heater not working well in my Honda civic 19 answers

    I have a 2005 Honda civic. My heater only works when I drive about 30 mph or more, but not always. Sometimes even while moving it will blow non heated air.It blows cold air at stop lights or when g...

    2005 Honda Civic LX

    -

    Maintenance & Repair

  • My heater blows cold air and the engine temp gauge went all the way to the top then quickly down when I turned the heater off. What could it be? 3 answers

    Per the boards, I topped off coolant and drove it around yesterday with no problem but this morning it did the same thing - blew cold air out the vent and the temp gauge went all the way up then to ...

    2005 Honda Civic EX

    -

    Maintenance & Repair

  • Air Conditioner 11 answers

    I just purchased a 1995 Honda Civic knowing the air conditioner was not working. It is blowing air but it is not cold air. After reading several reviews of this car, it seems the air conditioner is ...

    1995 Honda Civic LX

    -

    Maintenance & Repair

  • Heater not working 5 answers

    I have gone thru most the threads to to try and find my answer. Here is the back ground my car was hit on the drivers side front and rear door not hit hard just pushed the car about 3 feet, after I ...

    2005 Honda Civic Hybrid

    -

    Maintenance & Repair

  • Why my heater stop working 1 answer

    Hear was working great until I got the timing belt and water pump fixed

    Honda Accord Coupe

    -

    Maintenance & Repair

Search Honda Civic Questions

Honda Civic Experts

#1 Takoda Fraser
Takoda Fraser
Reputation 970
#2 Jonathan Ford
Jonathan Ford
Reputation 960
#3 Tom Demyan
Tom Demyan
Reputation 940
View All

Related Models For Sale

Used Honda Accord
88 Great Deals out of 1,109 listings starting at $1,495
Used Honda Civic Coupe
50 Great Deals out of 986 listings starting at $2,950
Used Toyota Corolla
170 Great Deals out of 3,667 listings starting at $1,500
Used Toyota Camry
52 Great Deals out of 1,459 listings starting at $800
Used Honda CR-V
48 Great Deals out of 2,220 listings starting at $1,300
Used Nissan Altima
52 Great Deals out of 1,218 listings starting at $1,950
Used Mazda MAZDA3
86 Great Deals out of 2,163 listings starting at $1,500
Used Hyundai Elantra
102 Great Deals out of 3,053 listings starting at $1,149
Used Honda Accord Coupe
8 Great Deals out of 353 listings starting at $1,789
Used Ford Focus
83 Great Deals out of 2,040 listings starting at $1,199
Used Ford Mustang
6 Great Deals out of 1,124 listings starting at $2,500
Used BMW 3 Series
131 Great Deals out of 2,084 listings starting at $3,095
Used Nissan Sentra
126 Great Deals out of 1,634 listings starting at $2,480
Used Volkswagen Jetta
71 Great Deals out of 1,983 listings starting at $1,700

Used Cars For Sale

2017 Honda Civic For Sale
3 Great Deals out of 1,918 listings starting at $16,883
2016 Honda Civic For Sale
25 Great Deals out of 177 listings starting at $17,543
2015 Honda Civic For Sale
49 Great Deals out of 233 listings starting at $11,500
2014 Honda Civic For Sale
67 Great Deals out of 289 listings starting at $9,398
2013 Honda Civic For Sale
64 Great Deals out of 715 listings starting at $7,982