Ask Honest John

Most recently answered air con questions
I have a strange query. It was incredibly hot yesterday and I used the air conditioning on faster roads and opened the windows in 30mph zones. I thought the car looked dirty and got it washed and dried...
I have a Toyota Yaris Verso automatic and it has started developing a strange whistling/squeaky noise. It's only really noticeable when I engage D but often in P mode and when starting up you can also...
I replaced the aircon condenser in my BMW 320 at a price of £463. The condenser is located immediately behind the front grill, which a stone entered causing the damage. Can any 'deflector' be fitted behind...
I know that a/c reduces fuel economy, but what would achieve better fuel economy - to set a higher temperature and higher fan speed or to set a lower temperature and lower fan speed?
I have two Nissan Qashqai, both under 10000 miles, just out of warranty and both with broken air con. Nissan is graciously offering 75 per cent contribution towards the parts. But I'm still left with a...
In March, I bought a low-mileage (10,000) 2013 Porsche Boxster from a Porsche dealer, including - what I thought was - a rock-solid two year warranty. Initially, I didn't use the air-con (to save fuel)...
My Nissan X-Trail is under two years old and has done less than 8000 miles. The air con isn't working properly and I've been told by the Nissan dealer that all of the gas may have been used up and I need...
I have suspected that the air con on my 2015 Nissan Qashqai has not been particularly effective. A recent 200 mile journey in hot sunshine convinced me that it is totally ineffective. My local dealer tells...
I had my SEAT Leon fixed because of the emissions scandal. Shortly afterwards, the aircon failed - the compressor is kaput. I had it fixed for £804. Could this be related to the fix? The car has done 50000...
The air-con in my van does not seem to do much. Is it true it needs servicing every two years?