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 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

66,015

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.

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 out of 1 people think this is helpful.
66,015

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.

66,015

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 out of 1 people think this is 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.

66,015

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.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Civic

Looking for a Used Civic in your area?

CarGurus has 89,847 nationwide Civic listings starting at $1,299.

ZIP:

Search Honda Civic Questions

Honda Civic Experts

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

Related Models For Sale

Used Honda Accord
788 Great Deals out of 88,192 listings starting at $1,150
Used Honda Civic Coupe
145 Great Deals out of 17,599 listings starting at $1,500
Used Toyota Corolla
714 Great Deals out of 73,207 listings starting at $1,950
Used Toyota Camry
847 Great Deals out of 90,973 listings starting at $249
Used Honda CR-V
832 Great Deals out of 60,382 listings starting at $900
Used Nissan Altima
878 Great Deals out of 80,282 listings starting at $1,800
Used Mazda MAZDA3
204 Great Deals out of 30,809 listings starting at $1,495
Used Hyundai Elantra
486 Great Deals out of 52,912 listings starting at $1,995
Used Honda Accord Coupe
141 Great Deals out of 10,398 listings starting at $1,900
Used Ford Focus
541 Great Deals out of 57,043 listings starting at $800
Used Ford Mustang
396 Great Deals out of 47,365 listings starting at $1,999
Used BMW 3 Series
967 Great Deals out of 33,687 listings starting at $1,000
Used Nissan Sentra
422 Great Deals out of 56,370 listings starting at $1,400
Used Volkswagen Jetta
412 Great Deals out of 38,071 listings starting at $1,250

Used Cars For Sale

2017 Honda Civic LX For Sale
25,129 listings starting at $16,959
2016 Honda Civic LX For Sale
19 Great Deals out of 1,415 listings starting at $13,844
2015 Honda Civic LX For Sale
49 Great Deals out of 1,959 listings starting at $10,481
2014 Honda Civic LX For Sale
81 Great Deals out of 4,584 listings starting at $9,395
2013 Honda Civic LX For Sale
36 Great Deals out of 1,887 listings starting at $7,863