1993 Toyota Corolla No cool air!

Tiny
ADRUTTER
  • MEMBER
  • 1993 TOYOTA COROLLA
Air Conditioning problem
1993 Toyota Corolla 4 cyl Wheel Drive Type unknown Automatic 185471 miles

The fan works and blows warm air, not hot air, but no cool air. I have not checked the cooling or radiator fluid at all in at least the past 2 years. I know, shame on me. Everything else on the car works great. What most likely is the problem?
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Monday, March 3rd, 2008 AT 4:31 PM

4 Replies

Tiny
MMPRINCE4000
  • EXPERT
The heater core could be blocked, in which case a cooling system flush may work. The cooling system should be flushed anyway if you have never done it.
Does the engine temp. Gauge show normal temp?

Or the switching valve and cable may not be working. If you move the lever, look at the valve on the firewall and make sure it is moving.
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Monday, March 3rd, 2008 AT 5:12 PM
Tiny
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Thank you for your advice :) It so much appreciated.

The car has never overheated and the car always shows that the temperature is normal. What does that mean for the cooling system?
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Monday, March 3rd, 2008 AT 7:05 PM
Tiny
MMPRINCE4000
  • EXPERT
The engine temp. Is critical to mormal operation. A closed thermostat will cause it to overheat, an open one will cause warm air out the heater, but more importantly will prevent the engine from going into a "closed loop" where the ECM takes over fuel and ignition requirements based on O2 feedback. This can cause damage eventually to the engine and convertor by causing a rich condition.
If the switching valve is working, I would start with a cooling system flush and see what comes out.
If you see gunk and rust then that is probably your problem.

Three things you can do if you want your car to last:

1. Change oil and filter every 3000 miles.
2. Flush cooling system every 2 years/24000 miles.
3. Drain transmisssion fluid and change filter (automatic) every 2 years/24000 miles.
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Tuesday, March 4th, 2008 AT 6:56 AM
Tiny
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Thank you so much.

I was reading info on this site as well so I am starting to see how important all the little things are.

I appreciate everything :)
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Tuesday, March 4th, 2008 AT 7:07 AM

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