Normal for A/C to make car engine run louder and have less Oomph?

[Whappers]

Afternoon guys!

My dad just got his car back recently after being involved in an accident. I've read mixed reports about the repairers. Anyway...

Today when I was driving it home from work, I noticed that there wasn't much power under acceleration when the A/C was on and the car seemed a tad noisier than usual. I don't recall the A/C being on affecting performance that much pre-accident but I can't be sure. It seems to up the engine revs slightly and run generally louder even when idle. The louder operating sound isn't really something I recall before. Is this normal (and am I imagining things) or do you think there might a problem brewing?

Many thanks.

 

[Whappers]

Was the A/C touched in anyway during repairs, as they may of overcharged the system with refrigerant.

The entire front of the car was smashed in including the radiator so I'm guessing... The engine itself escaped being wrecked somehow but I don't know much about cars unfortunately. Is it likely the A/C would have been touched?

How big is the engine, small engine = more of a drain from the AC.

Vauxhall Astra Design 1.6 2008

 

[Whappers]

It's definitely not right. I was just outside again and turned it on and the sound cranked right up. It's like a jet now. Video coming...

 

[Whappers]

It actually got louder after filming this and cranked up yet again. What do you think guys?

 

[Whappers]

Vauxhall is a mystery to me but I know Nissan systems. Rad fan runs constantly on low speed while AC is on, if water temp rises then fan goes to high speed.
Is that fan running when the AC is off?

Well the A/C gets turned on at the 0.06 in the video. Anything before is just general car fan noise.

 

[Whappers]

Sounds like the cooling fans have gone into overdrive, think best bet is to return it to the garage and let them have a look.

I've just emailed them as I'm busy on Monday and they're now closed. They better repair it free of charge or they'll wish they had!

if you got twin fans, one of the fans should run all the time when the a/c is on, But if one of the fans die then it resorts to just one fan and they can sound exactly like the above going into hyper drive

I really don't know if it's two or just the one we have...

 

[Whappers]

I should maybe have added earlier, but when the A/C was turned on it was done so on fan level 4. I don't know if the higher setting the louder it gets but it still shouldn't be making that sound surely.

Anyway, the garage emailed me back amazingly, after work hours! Very surprised. The guy said to bring it down to them on Tuesday so I'll be going down with my dad to get it checked out!

 

[Whappers]

Air con rad fan, or secondary cooling fan, will usually engage by default if the blower speed is set to maximum.

Should it sound like it does in my video though?

Also, would engaging maximum have more of an impact on the engine performance than say A/C setting 1?