My heater in my 2003 Honda Civic LX Coupe is not working well. When my car is heated up, it begins to blow hot air, like normal but after about 2 minutes, it goes straight back to cold?

10

Asked by Clitten21 Mar 07, 2016 at 08:37 AM about the 2003 Honda Civic LX

Question type: General

After my car is heated up, it blows hot air, like it should. Then, after about 2 minutes or so of driving, it goes back to cold air even though my car is heated up. It also fluctuates back and forth after this between hot air and cold air...

7 Answers

223,755

Sounds like it may be low on coolant? or the thermostat may be getting bad. One other thing it Might be is the HVAC Heater Control Valve in the heater hose may be causing the grief.

1 people found this helpful.
10

I have a new thermostat in it. Just put it in about a week ago and saw it open up myself. I'm still having this issue, it's not low on anything either. Also, when going up a mountain called Green Mountain here in town, my car over heats. I've gotten out of the car when it does and have noticed that the fan is only kicking in whenever it feels like it, or when I press the AC button on the dash. I've replaced the fan switch from having this problem before and it worked fine for a couple of months but is now doing the same thing as it was before.

1 people found this helpful.
223,755

Also did you purge the cooling system from air when refilling with coolant? With the cap off until thermostat opens?

10

Yes, I had help from a very good friend of mine that works at Auto Zone and he came out of the store to do it with me.

223,755

Does the temperature gauge stay at normal operating temp. on the dash? And is it only the heat that goes from hot to cold?

1 people found this helpful.
10

The temp gauge stays normal on the dash unless I use the car for awhile or if I'm driving up a mountain. Then it begins to climb into the red. And yes the heat goes from hot to cold, then back and forth.

223,755

Well, to me it still sounds like there is air in the system. And those fans have to work properly, but have nothing to do with the heat in the car, just the temp. of the motor. You can check by running the car, when it starts to blow cold air, check the heater hoses. I suspect one would be noticeably cooler than the other one, indicating that there is still air in the cooling system. Some cars are very difficult to purge. There are garages out there that have a machine to purge the cooling system.

2 people found this helpful.

Your Answer:

Civic

Looking for a Used Civic in your area?

CarGurus has 3,400 nationwide Civic listings starting at $2,495.

Postal Code:

CarGurus Experts

  • #1
    ColdinMA
    Reputation
    2,390
  • #2
    Guru9CNGV
    Reputation
    2,140
  • #3
    GuruDMD1V
    Reputation
    2,130
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Honda Accord
37 Great Deals out of 905 listings starting at $2,799
Used Toyota Corolla
119 Great Deals out of 1,945 listings starting at $1,995
Used Toyota Camry
53 Great Deals out of 957 listings starting at $2,212
Used Honda Civic Coupe
13 Great Deals out of 265 listings starting at $3,990
Used Honda CR-V
84 Great Deals out of 3,826 listings starting at $1,995
Used Mazda MAZDA3
77 Great Deals out of 1,502 listings starting at $2,299
Used Hyundai Elantra
154 Great Deals out of 3,212 listings starting at $1,850
Used Lexus IS
27 Great Deals out of 339 listings starting at $5,800
Used Toyota RAV4
77 Great Deals out of 2,041 listings starting at $3,499
Used Honda Civic Hybrid
805 listings starting at $6,998
Used Ford Mustang
55 Great Deals out of 1,260 listings starting at $4,995
Used BMW 3 Series
72 Great Deals out of 1,174 listings starting at $1,995
Used Nissan Altima
25 Great Deals out of 669 listings starting at $2,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.