Mazda MPV This minivan was among the class leaders with its roomy interior and efficient powertrain.

A/C Problem

Old 07-02-2012, 06:41 PM
Junior Member
Thread Starter
Join Date: Jul 2012
Posts: 1
Default A/C Problem

My 2003 MPV A/C blow cold when we are standing still or going slow. However, once we get up to speed it starts warming up. When it is blowing warm it seems to blow humid air. Any opinion?
Old 07-03-2012, 06:26 AM
Senior Member
Join Date: Feb 2012
Location: Tirol, Austria
Posts: 756

Sounds like your starting to get low on refrigerant, when your at a stop the amount of heat that can be transferred is low enough that the current amount of refrigerant can handle the load without tripping the high/low pressure switch but once you get going it trips the switch due to better cooling across the condenser and lowering the pressure below the trip point. Take it to a shop and have them check the system pressure, alot of shops will do this for cheap if not for free (takes 5 mins if that). When at idle does the compressor seem to cycle (on-off-on-off) often like every 3-5 seconds?

If anyone else has an idea chime in!! I am not an AC expert, I just go off of my experiences.
Old 08-05-2012, 03:32 PM
MD is offline
Junior Member
Join Date: Jun 2007
Posts: 11

Just went through a lot of sh** with a/c because of stupid mechanic. Now I am an expert ;-) . 1./ Cold air /idle / warm air on Highway = means not enough circulation of Freon - possible clogged Drier/Evaporator OR clogged also Condenser . To stay away from huge expences - best you can do FLUSH A/C system . If it's not getting better - Drain system to recovery tank / replace Drier/Evaporator / check Condenser . And REFILL freon . Rergards
One more thing - you may check your Gas/Mileage With A/C "on" and A/ C OFF . Clogged A/C system takes much more gas . You better hurry - clogged A/C system won't last too long .

Last edited by MD; 08-05-2012 at 03:39 PM.

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.