Air con blowing warm air 1 hour after recharge

colino

Get your money back, he is entirely clueless beyond hooking up the machine.
The system needs to hold a vacuum for at least 30 minutes to prove it is capable of working reliably in the future. If it doesn't, air is getting in, so when you repressurise it, refrigerant gas and oil will leak out. A good tech will establish where the leak(s) are and advise on cost of repair. Some components are frankly too expensive to replace on ordinary cars, but at least you wont waste your time with the new make-cash-fast mobile regassing jockeys.
You may be lucky and the leak is a simple fix, and with the right amount of gas and oil added to the system (too much is as bad as too little), you'll get it running again for the remainder of our glorious summer. Then just leave the a/c turned on permanently.

robbies_gal

get your money back say its stopped working-most places wil do it as a guarantee if they tempdoesnt hold

Tinuel

neil.woos wrote: »

How much did the cow boy mechanic charge you for the work?

He charged £49.99

Tinuel

Ok, I got the work breakdown here in front of me:

The actions were per follows:

- Recycling: 0 ref, 0 oil
- A/C system vacuum: 3 min, mB: 10, min: 1 mB: 40
- Oil injection: g: 10
A/C filling: 740

not sure what any of this means. But I can assure you all that this was done in 20 minutes max and he was rushing to get to another job.

He also added a note which says the following: Due to the very low refridgerant/oil levels within the system, this may indicate a very slow undetectable leak. UV dye has been added to aid in future leak detection.

Additional info: slight pressure loss during the vacuum stage

If it was just slight, why am I without air con?

custardy

Tinuel wrote: »

Ok, I got the work breakdown here in front of me:

The actions were per follows:

- Recycling: 0 ref, 0 oil
- A/C system vacuum: 3 min, mB: 10, min: 1 mB: 40
- Oil injection: g: 10
A/C filling: 740

not sure what any of this means. But I can assure you all that this was done in 20 minutes max and he was rushing to get to another job.

He also added a note which says the following: Due to the very low refridgerant/oil levels within the system, this may indicate a very slow undetectable leak. UV dye has been added to aid in future leak detection.

Additional info: slight pressure loss during the vacuum stage

If it was just slight, why am I without air con?

a 'very slow' 1 hour leak!

societys_child

Have you tried phoning him so he can make use of the UV dye he added and maybe find the leak?

Tinuel

societys_child wrote: »

Have you tried phoning him so he can make use of the UV dye he added and maybe find the leak?

Yes I have. He said that when he left, it was working fine and it did not detect any leaks. He thinks that something might have snapped (a part) within that 1 hour post recharge that caused this leak.
I have asked his manager to call me tomorrow to discuss.

custardy

Tinuel wrote: »

Yes I have. He said that when he left, it was working fine and it did not detect any leaks. He thinks that something might have snapped (a part) within that 1 hour post recharge that caused this leak.
I have asked his manager to call me tomorrow to discuss.

How convenient. possible,but I would expect him to attend and check before even trying that line.

colino

"Additional info: slight pressure loss during the vacuum stage". What did he possibly think doing a vacuum test would be for then? The system was leaking when it couldn't hold the gauge steady and he saw that with his very own observation.
Even more clueless than I thought.
The system, "worked" for as long as the new fill found to leak through the open part of the system and drop below operational limits .
All the gear and no idea.

oscarward

The compressor is designed to pass lubricating oil around the system, this lubricates seals and keeps them working. Which is why it is recommended to run the system at least once a month. If the seals dry out in the compressor they will crack and then gas will leak out, not cheap job to replace a compressor.