A/C all of a sudden has gone into like Hyper-mode

LEWIS SHAKLES

MEMBER
2013 VAUXHALL ASTRA
1.6L
2WD
MANUAL
24,000 MILES

When I turn it on full blast it's like someone put a giant fan in front of me and is super powerful.

Same happens on hot. Be on number 0 and still gets car roasting hot.

Car also feels like lost power as of the A/C is on when it's not?

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Welcome to 2CarPros.

First, please understand that this vehicle isn't offered in the US, so my technical information is very limited. However, I will try my best to help.

If the air pressure has increased to the degree you mentioned, my first concern is that too much power is getting to the blower motor. That shouldn't happen. The first concern starts at the voltage regulator on the vehicle. It it is not limiting the amount of power produced, this can happen and will eventually burn things up for you.

So, here is a link that explains how to check an alternator. It's simple to do. What I need you to focus on is how much voltage is being sent to the battery with the engine running.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Here are a couple links you may find helpful when testing:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Let me know what you find or if you have other questions.

Take care,
Joe