Auto A/C diagnosis help-Answers for auto A/C troubleshooting

[supercharged turbo]

Do you hear a hissing noise when you turn on the a/c?

[Jeremy1982]

No hissing

[NR8]

Do you hear a hissing noise when you turn on the a/c?

What could this indicate?

[supercharged turbo]

Do you hear a hissing noise when you turn on the a/c?

What could this indicate?

Well in my case,I had the same exact problem and the expansion valve needed changing.When you put on the a/c,you would hear a hissing noise for a few seconds and then it would stop.

[nemisis]

Can someone recommend me to a decent AC tech that won't dig out my eye and conclude that my whole system needs a do over?

I'm getting a rattle from the compressor when it cycles on. I believe the bearing may be going bad. So I want an expert opinion on the matter. Also, is it possible to just replace the bearing or do I need a new compressor? Vehicle is a VRG galant.

Ever got this sorted out im getting a similar problem and believe its the bearing also...and who did you go by

[THE SYNDICATE]

My car was down for about seven months. When I start it and turn the Ac on I get a smell from it and it then goes away.

I went in front and press the valve and had sprayed out from it. I'm thinking if there is a leak it would not have had gas in the system. I now press it and gas spray out.

When I put it on u still getting the slight 'bad odor' smell and it goes away. I think the Ac should be a little colder as well.

Any suggestions?

[NR8]

Slow leak maybe. Unless something dead inside.

[THE SYNDICATE]

Slow leak then. Lol


Don't think anything dead inside. Lol


Will buy a poppy to kill the smell in the car yes. Until it stops working.

[NR8]

Had a leak in mine and it had that bad smell that 3 air fresheners couldn't mask. It was still cooling a bit too when outside wasn't too hot.

[THE SYNDICATE]

It's a slow leak. Confirmed!

Now onto my next question, what alternatives are there for a b12 evaporator besides b12 and universal coil ?

What will work?
What coil from what vehicle can retrofit into the b12 evaporator housing etc. ?

[yvan300]

Can someone recommend me to a decent AC tech that won't dig out my eye and conclude that my whole system needs a do over?

I'm getting a rattle from the compressor when it cycles on. I believe the bearing may be going bad. So I want an expert opinion on the matter. Also, is it possible to just replace the bearing or do I need a new compressor? Vehicle is a VRG galant.

Ever got this sorted out im getting a similar problem and believe its the bearing also...and who did you go by

Yeah it was the bearing. A day I was driving on the highway when the bearing went, all i heard was a loud hiss, then the AC stop working followed by a loud grinding noise. The clutch was still engaged. The grinding noise went away when the clutch was disengaged. End up buying a new compressor.

[skylinechild]

[cool story time]
i recently fixed the Ac in my car. back in august.they changed two seals, blower motor resistor and filters and dryer bottle. ( i supplied the blower motor resistor and filters) worked flawlessly. Got 3 months warranty on the job bill was $1276

fast fwd to the end of sept and it refused to get cold.
when i pressed the button you would hear the Ac compressor engage an it wouldn't get cold.
took it back to them yesterday -31 OCT 2015.

got there at 7am sharp and they were already packed !!( they open @7am)
waited till like 12:30 pm the guy comes up to me an says your car is fixed.
calls me downstairs to check it out.
shows me which seal was bad (it was a seal by the condenser- i thought it was a faulty evaporator).

so i line up by the cashier to pay - cashier guy watches me strangely like WTF- he says..you good. no charge for the replacement seal nor new gas nor for oil or dye..you were within warranty period.

i was like

[/end of cool story time]

this is what i call business. next time i need Ac work done thats where i goin.
no offense to the other reputable shops that advertise here.

in fact i did check one other shop.
the woman answered the phone like if is she house phone.
(king kool- u guys need to work on this)

the name of the place is K wilson auto tech in arima.
12 Aleong St Trinidad
868-667-3749

[Morpheus]

^^That was in Trinidad?
That is business to support!

[skylinechild]

^^That was in Trinidad?
That is business to support!

yes !!! i was like
mankind went thru the system again...and change seal an gas up an oil up an add bk dye an ting...i was totally amazed. i had to ask TWICE if is anything i owed...

only thing i didnt like was the wait dred..but small thing. i lime upstairs in the customer waiting area...cable to watch an free tea coffee milo etc.

i approve and endorse.

[THE SYNDICATE]

U do realize the business men rarely giving advice

Moderator Hook needs to step in.caused he warned Peddlers in the past. The purpose of this thread is to give advice and not pedal ur business. If the advice given to the customer is sensible and reasonable the customer will visit the said business place.

I'm
Still waiting on an answer to my question.

[skylinechild]

U do realize the business men rarely giving advice

Moderator Hook needs to step in.caused he warned Peddlers in the past. The purpose of this thread is to give advice and not pedal ur business. If the advice given to the customer is sensible and reasonable the customer will visit the said business place.

I'm
Still waiting on an answer to my question.

u do realize that no one actually really cares about doin a good job.
They just want you to spend money,and one of the techs recommended in THIS thread i visited.
he charge me to pressure test and say everything good, and wanted to charge me $800 to gas up with R134 to find the leak.

so far ive changed three seals to date.
i still wonder if i did go by him if would have been able to find the leaks.
AFTER i visited him he said no leaks, i visited K Wilson auto tech in arima.

as you would say performance beats ole talk eah....

[THE SYNDICATE]

This thread needs a clean up IMO and a restriction on the Ac business to only view and no comment.

Cause if they can't give advice other than 'check we shop' what's the point!

U can't tell me the Nissan b12 is a 1989 car and not one Ac business place can give advice on interchangeable parts, if any at all,or what options are available.

Smh

[skylinechild]

This thread needs a clean up IMO and a restriction on the Ac business to only view and no comment.

Cause if they can't give advice other than 'check we shop' what's the point!

U can't tell me the Nissan b12 is a 1989 car and not one Ac business place can give advice on interchangeable parts, if any at all,or what options are available.

Smh

more than likely what they'll recommend is a universal replacement.
ie something that fits in the casing and they'll insert foam inside the casing to ensure the core doesnt rock or move about or experiences vibration.
they'll bend the lines to suit the placement in the casing and install the necessary hardware that needs to go in the casing...and close it back up.

try looking for a "direct replacement" - something thats made to fit the evaporator casing for example a brand like 4 seasons and such.

your thing is you need to find a evaporator to fit your casing.
you cannot change the casing as the casing is fitted to an bolted onto the HVAC unit under the dash.

getting a larger evaporator and by extension a different housing (casing) is nice..but it wont line up with the space in the HVAC assembly - ie wont fit or wont bolt up.

this should help....abit
maker nissan
parts code 27620
parts no 27280-50A00
parts name EVAPORATOR ASSEMBLY,COOLER

[THE SYNDICATE]

Thanks.

Thing is the Ac techs should be able to say of the bat, which size coil, replacement of another model( if possible) etc etc. because of experience.

The car is a 25 yer old
Car, u would think that Ac experience will be shown in this instance.


All I see is the businesses pedaling on this thread are new to the business and have no experience in a variety of vehicles. I am taking notes of the names and will not be recommending them to anyone.

Looks like
All they know to fix are tidas nowadays.

[Hook]

Man, it's like trying to rake the ocean.

The oil peddlers do it. Some noob would post a whole new thread to ask some sheit like "what's the best oil for my 2004 NZE Corolla?", instead of using the search (because you MUST the first person out of 12,000 tuners to ask that).

Then some powerseller would post "I sell...(blah blah blah)...", instead of posting "well, the manufacturer recommends (blah blah blah), which you can use if you're not losing any oil...synthetic, dinosaur blood...blah blah blah...budget, change interval...I have this package deal...".
There's a thing about unsolicited advertising in the technical forums, but when you ask for someone to recommend something, of course the hustlers are gonna come out and holla for your dolla.

I'd love to delete the "come to my store and we'll check it out" replies, and ban the whole lot of them for that kind of douchebaggery, but that would be an abuse of power.

The most we could do is appeal to them to actually lend their knowledge and expertise to users and make informative responses instead of just plying their trade.

Give us responses like "well, from what you describe, it could be a faulty [thingamajig], or a slow leak, but the only way to know is to put the gauge on it...(blah blah blah)...check your technician or give us a call at 6**-****". Let the tuners decide if to patronize your business place instead of forcing it and looking like a money Satan.

[THE SYNDICATE]

^100% agreed!!

[supercharged turbo]

Agreed

[Kinday]

Hey guys, looking for some help....After almost a year of great service, the AC compressor on my car discharged one day and released the gas. The fans were not connected at the time and I assume the system built up a lot of pressure and vented through the compressor. The problem is now the AC works well only while the car is moving. Once the car stops for any prolonged time the air blows warmer. Being in heavy traffic on a blazing hot day is pure frustration.

Would I have to get a new compressor or can this faulty one be repaired since it still works but only when the car is moving?

Kind regards

[trini iceman]

Could this be the result of clogged condenser fins restricting air flow?

[skylinechild]

Hey tuner I've got a wingroad y 12 with an intermittent problem , a/c colds very well , cycles on/off in a timely manner but in recent time when it cycles off I does not come back on . If left for about 10 - 15 mins it re starts normal . System was checked no visible issues found , it was recommended that I may have a faulty relay . Suggestions are highly welcomed cuz I need this prob gone asap, thanks tuner .

check the pressure switch...

[originalbling]

getting a few minutes delay for ac to come on especially after the car is parked up for a few hours.
Sometimes it cuts of randomly then works fine. blower runs though, just no cold air and you hear the compressor/hissing sound when cold air starts to blow.

Car is a mazda3 - going to get it checked this weekend, but was wondering if anyone had this issue before and what was the solution.

*update* - turned out to be a faulty relay. swapped with horn relay to confirm. changed relay and working so far.

[rharripersad]

2006 bluebird sylphy. The ac comes on most times when the car is started then runs cold for any where from 5-15 minutes then the switch changes to outside air and then it blows hot and remains that way. I have tried changing the thermostat and pressure switch. Not fixed.
Initially the system used to be switching between inside air to outside air every minute or so and when on outside air it got hot for about 30 seconds before switching back to inside air and got cold again.
I heard of another guy on tuner here asking about the earlier switching stage I experienced as well. Dunno of its a common problem with the sylphys?

My ac guy and auto electrician are baffled?

Any recommendations or places to fix this?

Was this ever resolved? If yes… mind sharing the issue?