A/C not working?

VEEJ77

MEMBER
2000 HONDA ACCORD
2.4L
4 CYL
2WD
AUTOMATIC
145,000 MILES

The A/c quit working suddenly. Here are my observations:
1) All switches on the dashboard work and light up. A/C switch, recirculate, vents etc.
2) Compressor clutch does not engage.
3) Condenser fan does not turn on when A/C is switched on.
4) Both fans work after vehicle has reached running temperature and gets hot. Fans are not the problem, I believe.
5) No voltage is seen on the wire going to the compressor.
6) Pressure switch on the high side does not show continuity.
7) Pressure switch plug contacts show a voltage of 4.7V
8) Have not run a wire to the compressor from the positive terminal of the battery to see if clutch will engage. Afraid since am not sure if the voltage should be battery or lower.
9) Have not shorted the contacts in the pressure switch to see if compressor clutch engages. Not sure if this could lead to damage.
You help and suggestions will be greatly appreciated.
Regards,
Veej

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Sunday, March 8th, 2015 AT 7:18 PM

15 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

You may have a leak and are low on refrigerant, your next step will be to go over these guides to help us find the problem.

https://www.2carpros.com/articles/air-conditioner-leak-detection

and

https://youtu.be/4UjfQKvrB6Y add Freon video

and

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

Please run down these guides and report back.

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Friday, June 19th, 2020 AT 1:23 PM

VEEJ77

MEMBER
2 POSTS

Hello,
I found that the low side schrader valve is leaking. I heard a hissing sound. I pressed the pin a bit and it stopped. Pressing the pin down does not release any gas. Hence I assume that there is no gas in the system, which also relates to the fact that the pressure switch does not show continuity. I would appreciate if you could please lists the steps that I need to do to refill the system.
Regards

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Friday, June 19th, 2020 AT 1:23 PM

MHPAUTOS

MECHANIC
31,937 POSTS

To do this job correctly, you need to evacuate the system and check that it holds a vacuum, with the system holding vacuum, you need to hook up a due manifold gauge and a charging unit, there is a precise weight of refrigerant required this must be added exactly as over or under charging will effect the system, using cans and adding refrigerant using guess work is not an option if you want this done correctly.

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Friday, June 19th, 2020 AT 1:23 PM

KAYLASHAE

MEMBER
1 POST
2000 HONDA ACCORD
4 CYL
2WD
AUTOMATIC
222,465 MILES

My air conditon im my car get cool so we tried to put refregerant in but it would not go in. What is wrong with my air.

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Thursday, December 17th, 2020 AT 11:24 AM (Merged)

KHLOW2008

MECHANIC
41,814 POSTS

Hi kaylashae,

Without testing the low and high pressure, how do you know the system requires additional freon?

Seems freon could be overfilled resulting in the compressor cutting out.

When A/C do not cool, you need to confirm if it is the system that is at fault or the air flow which could be due to a faulty air mix motor.

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Thursday, December 17th, 2020 AT 11:24 AM (Merged)

EJAMHARRIS

MEMBER
1 POST
2000 HONDA ACCORD
6 CYL
4WD
AUTOMATIC
11,300 MILES

A/c works but the air is not cold, except on high

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Thursday, December 17th, 2020 AT 11:24 AM (Merged)

KHLOW2008

MECHANIC
41,814 POSTS

Hi ejamharris,

If the cooling efficiency is good only on high speed, problem could be with the air mix door. Check if the air mix door is operating and linkages are not stuck.

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Thursday, December 17th, 2020 AT 11:24 AM (Merged)

ELISEOANDSUSY

MEMBER
1 POST
2000 HONDA ACCORD
6 CYL
2WD
AUTOMATIC
124,000 MILES

Hello my name is Eliseo. Im having trouble with my ac. I thought the ac was going out but then it started working, then it dosent work like for 3 days I live in florida I need help lol. Im tring to avoid sending it in. If that my only option so be it. I recently bought the ezchill kit when I put the gage on the ac. It read 30 filled. Its not kicking the ac. Is it the compressor help thanks

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Thursday, December 17th, 2020 AT 11:24 AM (Merged)

KHLOW2008

MECHANIC
41,814 POSTS

Hi Eliseo,

You need to check if power is being supplied to compressor via relay. If power is present then it should be the clutch or its coil that is bad.

If power is not present, you need to check/test the AC compressor relay.

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Thursday, December 17th, 2020 AT 11:24 AM (Merged)

MICARR

MEMBER
1 POST
2000 HONDA ACCORD
4 CYL
2WD
AUTOMATIC
135,000 MILES

I have been having an ac problem. The unit is charged but when turning on the ac the compressor engages runs for about a minute or less then disengages. The coolant fan (on radiator) does not run when turning on the ac at all. I have checked fuses and replaced relays with no positive result. Where should I look next to diagnose this isssue. Thanx in advance

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Thursday, December 17th, 2020 AT 11:24 AM (Merged)

KHLOW2008

MECHANIC
41,814 POSTS

Hi micarr,

When the cooling fans does not come on, the pressure would build up in the system and that would cause the compressor to cut off.

This guide can help us fix it

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

Did you test the fan motors?

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Thursday, December 17th, 2020 AT 11:25 AM (Merged)

JANAMAY23

MEMBER
1 POST
2000 HONDA ACCORD
4 CYL
2WD
AUTOMATIC
93,000 MILES

Over the past 6 months, my AC has begun to blow room temp air when the car is either going at low speeds or when I am idling. When I am driving 50-60mph, it blows cold air. I took it to a friend of my husbands to look at and he says the AC is charged and it needs a new air compressor for $450. Does this sound accurate? Is there any way I could tell if it's the air compressor? Does an air compressor go out on an Accord with 93000 miles?
Thank you,
Jana

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Thursday, December 17th, 2020 AT 11:25 AM (Merged)

KHLOW2008

MECHANIC
41,814 POSTS

Hi janamay23,

Compressor can be tested by getting the pressure readings while in operation.

There is no actual lifespan of a compressor but after six or seven years of usage it can possibly give way.

If the cooling fans are not working well, low vehicle speed will cause the AC to work below efficiency.

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Thursday, December 17th, 2020 AT 11:25 AM (Merged)

GOODSTUFF123

MEMBER
1 POST
2000 HONDA ACCORD

Air Conditioning problem
2000 Honda Accord 4 cyl Front Wheel Drive Manual

My A/c keeps going in and out. It'll blow cold air one second then hot air the next. On my console I've noticed that the green buttons go off and on. When off there is no cold air flowing just the fan running. Most of the time the lights kick back on and it'll start blowing cold again. The fuse is ok, my battery is ok, I took it apart and looked over the wiring. Nothing seems out of place. Any help would be greatly appreciated!

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Thursday, December 17th, 2020 AT 11:25 AM (Merged)

MSMEREDITH

MEMBER
9 POSTS

It's possible that you are low on refridgerant and the compressor is cycling on and off because you are just at the tipping point. Any lower and it won't work at all, any higher and it will blow cold. Have a A/C person put a pressure gauge on it to see if your pressure is adequate.

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Thursday, December 17th, 2020 AT 11:25 AM (Merged)