AC Problems not working?

Tiny
J-RAM
  • MEMBER
  • 1998 HONDA ACCORD
My Honda Accord 1998 four door AC control buttons are not working but the air is blowing (not cold). Any suggestions? I don't know what to check first. Fuses, electrical, my fans? I don't know?. I need at least 200 characters in order to send this message. Don't know what else to say. So I am just going to type in some random letters. Kkjb hvfdhj vvddh
Sunday, August 25th, 2013 AT 5:56 PM

56 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
If the fan is working, problem is most likely a fault with the control panel. I would try that first as they had problems. This guide can help others with the system not working.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down this guide and report back.

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Monday, August 26th, 2013 AT 11:06 AM
Tiny
SRIESTERER
  • MEMBER
  • 4 POSTS
  • 1998 HONDA ACCORD
  • 3.3L
  • 4 CYL
  • AUTOMATIC
  • 167,000 MILES
Help. My car is overheating and it won't blow any hot air. It hasn't been blowing hot air for quite a while now. So I did a coolant flush and replace thermostat it still doesn't blowing hot air. Recently however it has been overheating. I noticed a hairline crack in the top of the radiator couple weeks ago and it was blowing steam out and overheating. The gage was on red for sbout s half mile as I drove it home. I put some quicksteel on the crack but the car wouldn't start. Two days later it did start though same sympt oil in the coolant and vice versa. I'm pretty sure the coolant is flowing because both radiator hoses are cold to start but the top gets warmer as the engine gets warmer. There are no abnormal leaks of coolant that I have found and no abnormal low levels either. The car is a 1998 Honda Accord.
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,154 POSTS
If you have oil in the coolant and coolant in the oil, then you most likely have a bad head gasket. Check that first.
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
SRIESTERER
  • MEMBER
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Sorry but that post it took out some of my question. There is no oil in the coolant and vice versa. Also the night it overheated and I got home there was not much oil left in the tank. Not sure why.
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,154 POSTS
Do you mean there wasn't much COOLANT in the tank? If so, have you checked for leaks? When you replaced the thermostat, did you bleed the system so there are no air blocks?
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
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I change the thermostat the same time I flush the coolant so there was no coolant in the system. Is that what you're talking about
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
SRIESTERER
  • MEMBER
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How do you bleed the system? I've never r. Eally seen any leaks. Although the day after it overheated I had to add about a quart of coolant to it
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
NDMAND
  • MEMBER
  • 5 POSTS
  • 1998 HONDA ACCORD
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 286,000 MILES
Hi,

The problem started a couple of weeks ago. I'd turn on the air conditioner, and it would cool just fine for a while. Then it blow warm (outside warm, I think) air for a while, then it would blow cool for a while. The last couple of days, it has just given up and is blowing warm.

I had a similar event a year or so ago. I think the mechanic said, it's not the AC but a short in something called the PCM or ECU. I took a trip to the junk yard and replaced it.

When I mentioned this to a Honda mechanic recently, he said the PCM is totally separate from the AC, so it doesn't make sense. All I know is that my nearly new car (286,000 miles) is blowing warm air. Any ideas. It is okay to be basic as I am still trying to identify the condenser so that I can see if it is coming on.
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
MASTER TECH DAN
  • MECHANIC
  • 83 POSTS
If the AC is full refrigerant the temperature blend door actuator sounds like it is going out here is a guide to show you what you are in for when doing the job and a diagrams below to show you the location for your car.

https://www.2carpros.com/articles/replace-blend-door-motor

Check out the diagrams (Below). Please let us know what happens.

Cheers
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,154 POSTS
Sometimes when you drain the coolant and refill it, air gets into the system and causes blockages. As a result, it can cause the vehicle to overheat, the heater not to work. Some vehicles have a bleeder right on the thermostat housing to allow air to exit. Others have nothing. In those cases, I always loosen the return line from the heater core to see if any air comes out.
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
NDMAND
  • MEMBER
  • 5 POSTS
Thanks,

I haven't checked the freon since we started there last year only to find the real problem. However, I suppose one could easily lose thier freon over the course of a year.

Another website suggested that the ACC relay (I guess that's the air conditioner compressor clutch relay) or condenser fan relay could have gone bad. Do you think that could cause my problem?

The relay solution doesn't quite make sense to me since it would seem that an electrical part like that would probably fail all at once.

Ndmand
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
HT
  • MEMBER
  • 14 POSTS
Hi: I had the same problem. The Honda mechanic fixed my problem by replacing the a/c clutch coil.
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
NDMAND
  • MEMBER
  • 5 POSTS
Thanks, I have been thinking of trying replacing the AC clutch relay. How much did that clutch coil cost ya?

I have also noticed that when I cut off the AC, a kind of groaning sound comes from my dash area. Did you experience that too?

Ndmand
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
I would like to correct what the Honda mechanic about the ECU being separate from the AC. In fact the AC is also linked to the ECU, during full throttle acceleration, the ECU cuts off the AC clutch momentarily to enable full power from the engine and this circuit can also give problems.
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
PARIT65
  • MEMBER
  • 1 POST
  • 1998 HONDA ACCORD
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 137,000 MILES
1998 honda accord a/c not working I check fuse it is ok. Then I turn the car on and turn a/c on and check the compressor but it was not engage.
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
NDMAND
  • MEMBER
  • 5 POSTS
Thanks Klow,

So I am not crazy. After I read a bit more, I thought that the Honda mechanic may have been off just a bit.

I have a lot of confidence in the Honda shops, one in particular.

So I did what you suggested and replaced the blend door actuator and it worked! This site is smarter than the Honda mechanics lol

Ndmand
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check if it has the correct amount of freon R134a-low/high pressure okay -check the clutch, AC relay and low pressure cut off switch
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi Nmand,

Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help

Cheers
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
WIINC1
  • MEMBER
  • 3 POSTS
  • 1998 HONDA ACCORD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 181,000 MILES
HI All,

My 1998 Honda Accord EX has an issue with the air conditioner unit. While the unit blows air, the air doesn't get colder after a 10 minute period of time. While the unit runs, the air conditioner will make a high pitched noise. The noise goes away after you turn off the air conditioner.

This started on 5/9/11.

What process should I take to be able to identify the root cause of the issue?

Thanks in advance for your help.
Brian
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
You mean it starts cold and gets warm?
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Tuesday, August 25th, 2020 AT 2:00 PM (Merged)

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