I Have A/C but no heat.


Asked by Jul 07, 2008 at 12:40 PM about the 1998 Ford Escort 2 Dr ZX2 Cool Coupe

Question type: Maintenance & Repair

It's the strangest thing. I Have A/C but it won't switch to heat. My mechanic put in new controls and all the
switches behind them but i still can't get it to work.

11 Answers


The problem might not be the switch, it might be the heating core that is in the dash. It is essentially a radiator that is under the dash that circulates the hot coolant that the heat is generated from.

2 of 2 people found this helpful.

you have to switch out the heater core under your dash...but beware, its quite messy.


make sure the heater tap/mixer is working. it controls the flow of coolant from the engine to the heater core. That'd be my first guess...

7 of 7 people found this helpful.

I would have thought it was the heater core too but I have A/C all the time which is what led my mechanic to believe it was the switches.

1 of 1 people found this helpful.

I didn't quite phrase my problem correctly. I have A/C all the time!


umm... Is it just cold air(outside air) or is the a/c compressor actually on? Do you hear any noises(the compressor catching) from the engine bay when you switch from a mode where the a/c runs to one where is doesn't? (I think it's the far right nob on the center console that does this(have the temperature nob on cold)) (Anyone have a wiring diagram for this car, I'm not familiar with the system and would like to have something to look at, to help figure out whats wrong)

1 of 1 people found this helpful.

it could be one of the linkages that attach to the blend door that switches airflow from the heater core to the evaporator. if that has broke even if the switches work the blend door will not move.

1 of 1 people found this helpful.

my best guess its the heater control valve that controls the flow of the coolant to the heater core is stuck shut, either it needs attention to the linkage or replaced, it would sure be a reason why you can't switch from a/c to heat, some are in the engine compartment, and most are next to the heater core, if it was the heater core it would be leaking or it would be blocked making your car overheat, i just checked and the heater control valve on your car is a direct from ford so you have to go to a ford dealership to purchase one if you plan on tackling it yourself.

1 of 1 people found this helpful.

Try running the ac with heat applied. If the a/c discharge temp drops you have coolant flowing to and through your heater core. Then the problem would most likely be electrical, but the possiblty of a vacuum concern could be there as well. If now rise in the temp of the air felt with heat applied, then your coolant shut off valve me be stuck closed.

is their a thermostat in your car,if your heater core was bad your windshield would fog up and you would smell collant have the thermostat checked it is eather been taken out or stuck open.


I fixed it. Process of elimination removed hoses from heater core on fire wall attached heater hose and flushed with cleaner forwards and backwards. heater core was clear and not plugged. Put my mouth on the connection and verified entire system would circulate. Wasn't over heating but I replaced the heater thermostat. Still no hot air. Flushed entire system It turned out to be the cable from the heater thermostat switch center dial. The cable goes to a gate that wasn't connected. Connected it it WAMO I got heat. My center dail is still broken and striped but with care it can be turned. If your is past repair you could turn with a pair of pliers clockwise. its uder the sterring wheel on the side of the heater core assemble box. It a metal prong sticking out.

4 of 4 people found this helpful.

Your Answer


Looking for a Used Escort in your area?

CarGurus has 188 nationwide Escort listings and the tools to find you a great deal.


Ford Escort Experts

  • #1
    Tom Demyan
  • #2
  • #3
View All

Related Models For Sale

Used Ford Focus
420 Great Deals out of 71,553 listings starting at $999
Used Ford Fiesta
85 Great Deals out of 16,297 listings starting at $2,700
Used Honda Civic
356 Great Deals out of 53,229 listings starting at $1,200
Used Ford Mustang
274 Great Deals out of 38,355 listings starting at $1,995
Used Ford Explorer
847 Great Deals out of 64,621 listings starting at $2,000
Used Ford Taurus
146 Great Deals out of 15,728 listings starting at $1,900
Used Toyota Corolla
646 Great Deals out of 68,592 listings starting at $1,449
Used Ford F-150
2,521 Great Deals out of 220,358 listings starting at $1,222
Used Honda Accord
524 Great Deals out of 95,306 listings starting at $1,300
Used Toyota Camry
797 Great Deals out of 74,914 listings starting at $1,700
Used Ford Expedition
471 Great Deals out of 20,227 listings starting at $2,500

Used Cars For Sale

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.