I went to Halfords UK, for air con refill. After the refill, it blows somewhat warm air.

Also every few seconds, there's a vibration and something that sounds like something releasing near the engine, it didn't make that noise and didn't vibrate every couple of second before we visited Halfords.

Anyone know if they broke anything and are they able to fix it, or if I take it to Nissan, should I give them the bill to pay for breaking my car?

Video link for the sound: https://photos.app.goo.gl/eSpMihFNKe2xivLc6 https://photos.app.goo.gl/BTkxBqU5KEEUGdDG9

Sorry, I'm not a car guy

  • While you asked for a refill, did you know what was wrong with the A/C? It sounds like the compressor is trying to switch in and getting switched out due to an issue. Not likely to be Halfords fault, unless they overfilled it...
    – Solar Mike
    Commented Aug 29, 2019 at 20:17
  • Welcome to Motor Vehicle Maintenance & Repair! I'm thinking it was overfilled as well.I would take it back to Halfords and have them check their work ... sounds sketchy as heck. Commented Aug 29, 2019 at 21:40
  • sounds like something wrong with the compressor or the compressor driving components. overfilled would probably still give somewhat cool air. Commented Aug 30, 2019 at 0:06
  • @agentprovocateur Seriously overfilled makes the AC clutch cycle like in the video. That's a matter of fact.
    – Al_
    Commented Aug 31, 2019 at 12:27
  • @Al_ i havent even checked out the video so ill take your word for it Commented Sep 3, 2019 at 12:56

2 Answers 2


From the described symptoms it sounds to me that it's been overfilled. The compressor is kicking in - encountering the problem and switching back off. I'd avoid attempting to use it until you can get the system checked, some systems will shut off before damage can occur whereas others aren't quite so quick and depending on how badly it's overfilled you can end up destroying the compressor. The fact that it's vibrating noticeably would lead me to fear the latter (one of the symptoms of an overfill is that the refrigerant is in a liquid state where it should be gaseous and unpleasantness can ensue)

Take it to a decent garage that does A/C work and get them to check the pressure levels properly - I have to be honest I don't have a high opinion of Halfords "technicians" all to often they are actually retail staff with minimal training or experience. I've had the misfortune to (attempt) to use them for some small things in the past (e.g. changing a bulb, fitting wipers) when I've decided that I can't be bothered to muck about doing it myself in the cold/rain etc. I've literally never had them succeed. It might just be my local branch but I'm sure as hell not going to be letting a company whose staff can't even fit a wiper blade near anything like an A/C system.


That's clearly an AC compressor cycling its clutch on and off. Car looks pretty new and this means it's definitely cycling on high pressure, meaning that whoever serviced the car seriously overfilled it with AC refrigerant. Next time, check the refrigerant amount for your car (on my Vauxhall it's written on a sticker found under the hood) and actually tell the AC guy the grams of refrigerant that your car's AC requires. Might end up annoying the AC guy, but that's how you avoid being either overfilled or underfilled (and both things are highly detrimental).

Also, if your system has a leak, you're better off searching for leaks by yourself and then going to the shop with the original spare parts in your hands. Check the entire AC system for anything green and oily that glows to a UV lamp, and for anything that smells like fresh paint.

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