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Heating & Cooling 2nd Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #1  
Old 09-29-2011, 01:57 PM
hottpepp23 hottpepp23 is offline
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Default A/C turns hot when braking

Ok what the hell...i need to hit up Xibit and pimp my ride. Hot air from air conditioning when I hit the brakes??? Help! Thanx in advance.
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Old 09-29-2011, 03:48 PM
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So in other words, as you slow, the A/C temp gets higher?

Well, the condensor does need some air flowing over it but you should not get hot air instantaneously. If you are, two things come to mind:

1. Your A/C condensor (mounted in front of your radiator) is plugged and needs to be cleaned. Some brake cleaner and warm water will do the trick. Don't hit it with a pressure washer.

2. If it stops cooling only when you hit the brakes (come to a stop, put it in Park, foot off brake and check air temp) then there's a short somewhere that is interfering with proper A/C operation...in other words, your compressor is failing to operate.

3. I assume, since you are slowing down or at a standstill, your RPM's have dropped compared to when you are moving and the A/C works OK. When was the last time you checked or replaced your accessory drive belt?
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Old 09-29-2011, 05:32 PM
daggertats daggertats is offline
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our ford escape used to have the ac turn warm when you stopped. turned out it was low on r-134 . they charged the system and its been fine since
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Old 09-29-2011, 05:33 PM
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Good suggestion ^^^^ so that means a level and pressure check would be a good thing to do.
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Old 09-29-2011, 05:37 PM
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It may be a good idea to have a shop put some dye in it so they can check for leaks.
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Old 09-30-2011, 09:23 AM
hottpepp23 hottpepp23 is offline
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Default A/C turns hot when braking (cont'd)

It doesnt get hotter gradually when I slow down. If I have the A/C on it blows cold air awesome, but when i slow down to stop at a stop sign or red light I here a kind of "POP" noise from under the glovebox and the A/C instantly goes hot air. Also happens in vent mode too. I have to turn the A/C off and the blower to low setting, then turn it back on after driving about 50 feet. If I turn it back on instantly its still hot. The only thing that I have noticed is that is "pump" the brakes as I slow down the A/C will sometimes stay cold. LOL...thankfully winter is coming up - no problems with the heater.
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Old 09-30-2011, 12:03 PM
rfking rfking is offline
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I've not been into a dodge dash before so I'm not sure. Isn't there a vent or door that is operated by vacuum. The brake booster pulls vacuum and you could be losing the vacuum to the climate controls. Try what MADDOG said.
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Old 11-03-2013, 03:21 PM
needlotshelp needlotshelp is offline
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I have a problem with a/c going to heat when stopping. Can anybody help me fix this? It gets very hot when this happens. It makes a pop sound then heat.
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