Question about Heating & Cooling

1 Answer

Ac problems! When i slow down at lights or stop sings it blows hot! When on highway going at good pase it blows cold. Thought it need to be charged but gage says its full. Whats the deal?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,056 Answers

Try evacuating the system. Then put the right amount. It may have too much air in the system. This is usualy an indication of either too much charge or undercharged. In an overcharged system, the higher speed pulls the low side further down making it get colder. In an undercharged system, the higher speed is able to bring up the high side more, which also result in better cooling. A properly charged ac in good working condition should be able to keep the car comfortable even when idling, but gets even colder when the car is in motion.

Posted on Jun 29, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

AC works for about 300 miles then stops and blows hot air. New AC compressor and freon charge. After sitting for a while it will again blow cold.


I think you have a similar problem to mine. At highway speeds is when it happens. And it is not blazing hot? Right?
Your evaporator is freezing up - as this happens the ice surrounding it prevents the flow of air over the evaporator coils and the result is warm air coming out of the registers. If I turn off the AC for about ten minutes and let unit melt the cold air comes back. This does not occur in stop and go driving.
I combat it by either running the fan at a higher than normal setting to increase air flow over the evaporator and then turning off when it gets too cold, OR using the air control to allow warmer outside air to enter into unit at highway speeds to prevent freezing up.
Newer cars have more sophisticated sensors and controls to prevent this but some older vehicles are subject to this anomaly.
Since it works fine under normal conditions I have not messed around with the freon level in system. If you release a tad of refrigerant the low pressure switch will shut off the compressor sooner and help minimize ice buildup. Good luck.

Aug 19, 2016 | 2000 Ford Taurus

1 Answer

2005 nissan altima heater blows cold air when stopped and blows hot air when going down the highway. What could be the problem?


Check your coolant level. If it is low, what you describe will happen. Water pump works faster as rpm's increase, managing to get hot coolant to heater core (highway speeds). At idle, pump is not working fast enough to get the coolant to the heater core.

Feb 09, 2010 | 2005 Nissan Altima

1 Answer

AC blows hot air when i stop at an intersection or slow down.


Try cleaning the condenser located in front of the radiator , with either a garden hose or compressed air. If this doesn't cure the problem then have your a/c system checked for leaks and recharged.

Aug 17, 2009 | 1993 Pontiac Grand Am

3 Answers

Ac system does not get cold


you should go to a mechanic and check the A/C if the freon id low it won't cool , some time at mornig it give you the semsation that is cooling but probably not..

Aug 01, 2009 | 1999 Volkswagen Cabrio

1 Answer

1999 323i air con is freezing then becomes hot and humid


sounds like there is not enough r134 coolant in the system and when your slowing down the compressor stops turning. Have someone add some coolant and you should be ok.

Jul 01, 2009 | 1999 BMW 323 Series

1 Answer

Nissan 2000 ac hot when idle


the a/c condenser has a fan in front ( there is actually 2 fans if you sit on the car it will be fan on right side ) if this fan does not
come on immediately when you are parked and engine in idle
there is a problem with power to it, or motor failure. If you drive it
on the highway and a/c operates fine that's because air is circulating though condenser (thats what the fan is supposed to do at idle or slow traffic)

Aug 17, 2008 | 2000 Nissan Maxima

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

43 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2460 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...