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

20,945

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 17 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 910
View All

Related Models For Sale

Used Honda Accord
77 Great Deals out of 1,012 listings starting at $1,888
Used Honda Civic Coupe
54 Great Deals out of 821 listings starting at $995
Used Toyota Corolla
175 Great Deals out of 3,292 listings starting at $2,488
Used Toyota Camry
41 Great Deals out of 1,460 listings starting at $1,699
Used Honda CR-V
38 Great Deals out of 2,192 listings starting at $1,299
Used Nissan Altima
62 Great Deals out of 1,305 listings starting at $1,999
Used Mazda MAZDA3
93 Great Deals out of 2,421 listings starting at $1,900
Used Hyundai Elantra
130 Great Deals out of 2,672 listings starting at $1,541
Used Honda Accord Coupe
7 Great Deals out of 311 listings starting at $1,997
Used BMW 3 Series
143 Great Deals out of 1,679 listings starting at $1,499
Used Ford Focus
101 Great Deals out of 2,196 listings starting at $850
Used Ford Mustang
7 Great Deals out of 815 listings starting at $6,495
Used Volkswagen Jetta
92 Great Deals out of 1,951 listings starting at $1,200
Used Nissan Sentra
124 Great Deals out of 1,679 listings starting at $1,750

Used Cars For Sale

2017 Honda Civic For Sale
1,450 listings starting at $17,495
2016 Honda Civic For Sale
16 Great Deals out of 285 listings starting at $15,995
2015 Honda Civic For Sale
40 Great Deals out of 199 listings starting at $12,850
2014 Honda Civic For Sale
55 Great Deals out of 258 listings starting at $7,490
2013 Honda Civic For Sale
41 Great Deals out of 477 listings starting at $7,888