Air con leak sealant

[Reallyretired]

I haven't got a leak but came across this on Amazon. I know from past experience that small losses of gas can be a sod to locate and fix and wondered if anyone had tried this

 

[tonka]

No link ????????

Or is it Invisable dye

 

[Figaro]

How will you get it into the circuit, I thought they needed specialist equipment to cut in and add a valve ?

 

[EuroTrotters]

It does t work. I’ve worked on Automotive A/C for nearly 40 years. You need to find the leak. Then repair or replace the part(s).

 

[pwilmo]

Nope, dead easy , unscrew a knurled knob low pressure side, fit canister/aerosol,pierce canister with valve and open valve to add to air con gas.

That is a very simp!ified to give you the gist, instructions are very good, ki will contain hose ,screw down valve, all you need.

I had a small leak been repaired 3yrs now, it will be a waste of time for anything but a very small leak

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[Reallyretired]

Amazon product ASIN B00JVVUPRCApologies for missing link.

 

[Richard n Ann]

Our van lost most of it's gas in 2019/2020 I got the van out in April 2020 to go away and tried the AC.... Nothing
Quickly put some in it and left for Benidorm taking the 1kg gas cylinder with us for the way back
Anyway it's been alright ever since. R134a is very strange stuff.

 

[EuroTrotters]

The compressor seals can dry out.

Refrigerant carries oil vapour around the system.

It’s no myth, you need to run the a/c at least once a month.

If it’s very cold, the LP (low pressure) switch may prevent the a/c system to operate. Try and run it when the ambient temperature is above 10c

 

[Richard n Ann]

Nothing can dry out it's a sealed system, or supposed to be. Oil is very clingy and will stay round and in the nooks and crannies of a compressor (or engine) indefinitely. It's a much repeated meme in my opinion, it's been going round years and even takes in experienced engineers.

Here's what I think happens, and it's only a theory (or meme ) I was told by somebody in the industry that R134a molecules are in chains and long and thin, so if one happens to gets in a microscopic hole/crack/imperfection in the crank seal or whatever, the pressure in the system forces all the refrigerant out in a chain.

So... If your R134a AC system happens to be not leaking while switched off, it probably won't start leaking until the summer when it's used again, if ever. But if you keep using it you're mixing the molecules up and in with a chance of starting a chain leak....orrr if it has started leaking, a molecule mix up may stop it .

So Weighing up the odds above it makes no difference statistically whether you use it often or not. And that's kinda confirmed my exact experience with the van above. It leaked out in 2019 and has been ok ever since and it never has been used over winter. The car is the same, never used in winter and it fires up perfectly when we get a hot day.

Anyway each to their own

 

[philbrawn]

Sorry Richard but you are wrong the ac system on any vehicle is not a sealed system because the compressor is driven via a belt from the engine so where the shaft enters the compressor there is a shaft seal and it is this that stops gas escaping it relies on oil lubricating the seal and if the ac is not used the seal can dry out and gas will escape so running the ac will keep an oil film on the seal and the gas in. Hope that helps

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