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Ac pump will not engage - 2003 Kia Sorento

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My 2005 Fiesta (only 26k miles)air recirc light comes on intermittently and the engine loses power intermittently. What is the problem likely to be? Thanks


AC on the fritz. When the AC clutch engages, it robs a lot of engine power. When you have your heater control on defrost, it engages the AC to dry the air so your windshield doesn't fog. Try unplugging the wiring harness going to the AC pump and see if that helps.

Jan 07, 2017 | 2005 Ford Fiesta 1.3

1 Answer

AC clutch only engages intermittently.


on the Ac system is a low pressure switch ,sounds like its faulty so fit a pull or flick switch from ignition supply and run this direct to the pump

Jul 25, 2013 | 1998 Chevrolet Blazer

1 Answer

Ac problem


first thing is always check for any fuses that may control it. if the fuses are all good, then check to see if the clutch (on the front of the compressor pump) is engaging when it's turned on? if not then it's low on freon. It has to have a minimum pressure in the system for the clutch to drive the compressor so the compressor doesn't burn up. If the clutch does try to engage but doesn't fully engage, (slips) then the clutch on the pump is bad.

Apr 02, 2013 | Cars & Trucks

1 Answer

Air conditioner comes on comes out hot


the belt driven aircondisioning unit is located under the hood. there are usualy metal lines coming off of it and one should have a valve in it ...looks like a tire,air valve. when car is running, turn the AC on. the unit has a two part clutch that the belt will turn. when the AC is off...the pump or compressor will engage and the hole belt driven piece will rotate when the AC button is on. , when it is off....or not getting power to the clutch , the pully will spinn but the inside clutch will not.

iff the unit engages and turns when the AC is turned on, and still blows hot air, then you may have a leak in your refrigerant line. iff it dosnt engage, then check your fuses .if everything is good to go..then it is mostlikly a vacume issue located in the dash behind the AC switch and display that moves the vent from hot to cold....

Jun 08, 2012 | 2003 Chrysler Town & Country

1 Answer

My control unit wont switch on ac


It may not be a control unit issue. Be sure to check all fuses. You may have a pressure switch issue. There are at least 2 pressure switches located in the engine compartment. One is usually located on the back of the ac pump and there is usually one on the passenger side near the firewall on one of the aluminum ac lines. You can simply unplug the one by the firewall and take a paper clip and unfold it and use it for a jumper on the connector. Put one end of the clip in one side of the connector (the end of the connector that plugs into the switch) and the other end of the clip into the other side of the connector. Start your Tahoe and turn the ac on and if the ac pump is turning with the ac clutch engaged that means that you either have a bad switch or your are low on refrigerant. Feel the aluminum ac lines and see if they are getting cold. If so I would suspect a bad pressure switch. You can remove the paper clip while the vehicle is running and put it back in if you are not sure if the ac clutch is engaged. It should make a clicking noise when it engages and disengages. It is very simple to replace that switch. Simply unscrew it and screw the new one in and plug it in. It will hiss just a little when you remove and install so be quick. It will stop when you remove the old one and will hiss again a little when installing the new one. The switch on the back of the pump is not so easy. The refrigerant needs to be evacuated from the system before it can be replaced.

May 01, 2011 | 1999 Chevrolet Tahoe

2 Answers

AC pump clutch won't engage


They most likely did not refill the freon in the ac system.

Jul 11, 2010 | 1997 Chevrolet Venture

2 Answers

Serpentine belt slides over AC pulley when AC is off


The ac pump has a clutch coil,it is activated with the ac button,and then the middle of the pulley will turn this is the clutch,it only turns with the ac on,then when it is turned off,the pulley just turns not the whole clutch,so this is normal.

Apr 25, 2010 | 2002 Saturn L-Series

3 Answers

My honda 92 engine stops running when i engage the AC


is your AC pump turning? if not that couild kill an engine...theere is also a switch-usually on the pump- that controls engine speed when ac is on and pump kicks in, this might be faulty...problem usually confined two these two scenarios......hope this helps

Feb 26, 2010 | 1992 Honda Accord

1 Answer

Ac not working


if you by passed the relay and clutch engaged then this shows that pump works ??but was it getting cold on and around the restrictor valve where the pipes enter the cab is normally a valve block but american monsters use a valve in the pipe for cooling and if its not getting cold their or blowing cold inside cab then system needs re-gassing with R 134 gas if its an older system with R 12 gas then it will need to have adaptors fitted to valve connections and refilled with R134 gas.The main cause of A/C system loosing gas is porosity in the rubber flexible pipes also the back seal on the pump.Or just regass and put a leak stopper in the system

Sep 01, 2008 | 1998 Chevrolet K1500

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