Question about 1999 Toyota RAV4

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Turn on the ac but all i get is regular hot air sometimes mildy cold only at night

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You have to recharge your ac

Posted on Jun 26, 2009

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I put a new belt for the ac unit and connected it but i hear no sound or feel any air nothing is working. What can i do to fix it cause its cold at night. And hot in the day and i need it. 78 chev imp


In a 1978 Chevrolet Impala? The category you posted is home air conditioners.

Sounds like the fan has failed.

Heat comes from the radiator via the heater core and the air circulation fan. The radiator must be full of coolant.

Cold air comes from the air conditioner compressor via a clutch drive from the serpentine belt, sometimes a separate belt. Cold air comes from the evaporator element and the air is also forced by the air circulation fan.

First thing to do is find the fan body in the bulkhead and tap the back with the handle of a hammer. Sometimes the brushes stick. Then check the fuses.

Apr 29, 2016 | Chevrolet Impala Cars & Trucks

1 Answer

My 2002 Expedition air conditioner will sometimes blow hot air and others cold air


I would check the following possibilities:
1. Is compressor clutch working? - You need to do this when the ac is blowing hot air only - locate compressor drive pulley on engine - rubber belt wraps around it. Start engine and set to max ac. When the ac is blowing hot air, look at the center of the compressor drive pulley using a good flash light - watch it for a while, it should be spinning with the pulley - this means the compressor is engaged. If not, the compressor is not engaged. If your ac is blowing hot air, then the compressor should be engaged and running (trying to cool). If it is not engaged, then your compressor clutch is probably going out. Could be low voltage to clutch, but more likely the clutch is worn out and only working some of the time. Note: if working normally, the compressor clutch will engage and disengage in cycles- but the air should always be cold. If clutch is bad, compressor would need to be replaced (sold as one unit). This is tricky to diagnose and could take some time - you need to do it when ac is blowing hot air but set to max cooling.

2. Low on refrigerant or refrigerant has moisture in it? If your ac blows cold initially after being off for a while, then heats up, and continues to regularly cycle back and forth between hot and cool air, then the system may be low on refrigerant or the refrigerant may have moisture in it that is freezing and restricting refrigerant flow. An a/c shop can check refrigerant level and even replace refrigerant if moisture is suspected.

Could be other issues, but I would start with these.

Good luck

May 07, 2010 | 1999 Ford Expedition

1 Answer

1999 f-350 with a 7.3 diesel, turned heater on can't get temp control to switch back to ac. blowing both hot and cold air. Thanks


possible blend air door motor stuck, try tapping lightly on the servo motor while moving the temp selector from hot to cold,

Jan 22, 2010 | 1999 Ford F350 Regular Cab

1 Answer

BLOWN HOT ON REGULAR AC


You need to have you AC system recharged, you can do it your self with a kit from most auto parts stores or you can have a shop do it. you should be using R-13A

Aug 24, 2009 | 1998 Ford Ranger SuperCab

1 Answer

Nissan xterra..2000


your air con needs re gasing

Jul 07, 2009 | 2000 Nissan Xterra

1 Answer

A/C air sometimes cold, sometimes not on VW Beetle 2001 Turbo


AC will not work with temps are cold even when it is turned on. The air is colder cause the temp is colder. The AC cycles in hot weather because the AC charge is low and needs recharging. You will know this if you open the hood run the AC and you will hear the clicking sound of the AC compressor magnetic clutch. You can recharge it easily buy buying a compatible can of refrigerant. I suggest buying the kit with the gage so you don't overcharge the system which will cause freeze ups

Jul 03, 2009 | 2001 Volkswagen Beetle

1 Answer

1999 Ford f-150 blows hot air for ac


Sounds like a broken or cracked vacuum line under the hood.

May 24, 2009 | 1999 Ford F150 Regular Cab

1 Answer

AC not blowing cold air at times


poss causes are, sticking low pressure switch, defective Ac compressor clutch closing coil or incorrect clutch driven plate air gap, spec is 0.26 thousands.

May 11, 2009 | 2003 Ford ZX2

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