Had the same problem, checked all possible solutions but my service tech found that the Compressure clutch was not aligned properly. When the engine was cold, the AC was funtionning until sensor stop it but could'nt re-engage after the engine was warm (metal retraction).
He removed a spacer from the polley and problem fixed in 20 minutes!
Hey, another issue I had with hot/cold a/c and vent is the heater temp regulator valve located under the Outlander dash near the foot accelerator- valve does not close completely and allows some hot water to flow even when on off position. I didn't want the dealer to tear out my dash to fix the problem, so I installed a manual brass valve in the hot water line outside between the firewall and engine. Just have to remember to adjust it with the seasons.
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Re: air conditioner comes out hot and cold
We have to choices here.
first check the pressure on your a/c system and be sure that it's correct.
if a/c freon is low your compressor will engage and stop periodically.
second. if first step is ok then you may have a bad vacuum element.
they are located inside the dash and operate by vacuum. your a/c switch sends the air to open them or close them, if one is defective ( leak ) it may open and close allowing hot air or cold air to contaminate the system. " this is a very hard job to do "
so if first step fixes it then that's awesome if not let me know and i can look it up for you ( the steo 2 )
hope this helps
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if the ac system is very strong and there a lot moisture in the air the a'c evaporator core will freeze up and stop air flow threw the cold core only use the recuiculation part to cool the car down about 5-10 min the turn the recuit off
Someone will need to find out if the compressor clutch is failing, or if it is loosing power due to a pressure switch or other problem. A faulty relay or switch could get hot and switch off power to the compressor.
1.)If your System is OVERCHARGED this Will Occure due to the EVAPERATOR FREEZING UP
2.) Also if your HVAC Control Modual is Malfunctioning this will Aslo Cause this Condition, It Controls the BLEND DOORS that OPEN for COLD or HOT AIR Look Into these Items and Also Look Into wethrt the A/C Compressor Cycles OFF when it GETS OFF this Will POINT at the HVAC CONTROLER if it Cycles Off When Set For A/C or COLD Air
If the A/C blows cold at first, then gets hot, it may be because there
is air and moisture in the system. What happens is that as the thermodynamic cycle of moving
heat goes on, water in the system will freeze at the expansion valve, stopping refrigerant flow.
If you put a proper set of A/C gauges on it, the low pressure side would
show zero or a negative pressure, while the high side would be
>150... Usually low should be between 25 and 45, but because the
system is frozen up, nothing moves, so the compressor is acting more or
less as a vacuum pump.
Solution: Have a professional evacuate the system, replace the receiver/dryer, add
a bit of oil and then charge the system.
Need more information. The most important thing would be to watch the heater water valve move when someone turns the control from hot to cold, back and forth? Heater valve controls tend to be operated by vacuum, and switched by a heater computer. Lots of possibilities. But first tell us what you see move when operated? Valve is usually in engine compartment, in the heater hose. Follow the hot one.
On most cars when you push a button or slide a lever to change your choice of location where you want the air to blow out louvers move inside the dash to redirect the air to your chosen location. When you switch from heat to AC other louvers move. These louvers are often powered by vacuum lines running from the engine. If one of these louvers is stuck or if you have a vacuum leak in one of the lines it may be causing your problem.
if you recently had the system recharged they may have over filled the system. The ac system has both a HIGH and a LOW cutoff point to keep from damaging the compressor. If it is cycling the compressor on and off (you should be able to tell this by the ac clutch clicking on and off occasionally. If the pressure on the lines gets too high it will cutoof to prevent blowing the lines, if it gets too low it will stop the compressor from damaging itself. I had overcharged my 90 nissan once and it acted this way, it really acted up especially on very hot days.
possible low charge,possible leak,auxillary fans possibly not coming on,check you see when you turn your a/c on,do the fans get really loud occasionally,all the time,or not at all,if not at all ,you have a problem with the aux fans not coming on-