Question about 2004 Dodge Dakota

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Fan only works on high, setting 1 - 3 do not engage the fan, is it a switch problem

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Blower Resistor -- get at dealer

Posted on Aug 03, 2010

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Fan switch does not work. sometimes it would work, sometimes it wouldn't. then it just quit completely.

Posted on Nov 03, 2010

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1 Answer

The aircon system is fully gased yet the compresser wont engage, are there pressure switches in the system


Yes , two , a low pressure an a high pressure cut off switch . If either of these were bad there would be a DTC - diagnostic trouble code stored in the PCM - engine computer . Does your Captive have manual or automatic heating an A/C ?
Pressure transducer switching incorporates the functions of the high-pressure and the low-pressure cutout switches along with the fan cycling switch. The pressure transducer is located in the high-side liquid refrigerant line behind the right strut tower, between the right strut tower and the front of dash. The output from this pressure transducer goes to the electronic control module (ECM), which controls the compressor function based on the pressure signal.
HVAC Compressor Clutch Does Not Engage

1

Did you perform the Diagnostic System Check - Vehicle?
Go to Step 2
Go to Diagnostic System Check - Vehicle

2

  1. Start the engine.
  2. Turn the blower switch to any position except OFF.
  3. Press the A/C switch to the ON position.
Does the A/C compressor clutch engage?
Go to Testing for Intermittent Conditions and Poor Connections
Go to Step 3

3

  1. Connect a scan tool.
  2. Use the scan tool to command the A/C compressor clutch relay ON. When the relay is energized the cooling fan will also run at low speed.
Does the A/C compressor clutch engage?
Go to Step 8
Go to Step 4

Dec 04, 2015 | Chevrolet Captiva Cars & Trucks

1 Answer

2007 chrysler pt cruiser cooling fan does not work with ac


If refrigerant is low , high side pressure may not be high enough to engage the pressure switch to kick on the fans. Have the a/c system evac'd and recharged to capacity then recheck fan operation. Also, extreme cold weather can reduce high side pressure on a fully charged system preventing fans from coming on.

Feb 14, 2014 | Cars & Trucks

1 Answer

Condenser fan not engaging


Possibly low on refrigerant. When system is low on freon, it does not build up enough high side pressure to engage the condenser fan . When pressure is high enough. a high side pressure switch kicks on the cond. fan to maintain high side pressure. Have the system evacuated and recharged to proper level.

Feb 01, 2014 | 1996 Mercedes-Benz C-Class

1 Answer

Condenser fan not engaging when A/C turned on. All fuses and relays look fine. Tested fan with eternal power and it runs.


Possibly low on refrigerant. When system is low on freon, it does not build up enough high side pressure to engage the condenser fan . When pressure is high enough. a high side pressure switch kicks on the cond. fan to maintain high side pressure. Have the system evacuated and recharged to proper level. A system dye can be added to check for any possible leaks.

Feb 01, 2014 | 2004 Isuzu Rodeo

1 Answer

No electrical power to AC Compressor. The switch light comes on in car when AC power button is turned on.


  1. Check if air blows with the fan setting turned to high.
  2. Check that the radiator cooling fan engages when the A/C button is pressed.
  3. Locate the compressor.
  4. Turn on the A/C.
  5. Check if the compressor's clutch has been engaged.
  6. If the clutch engages, the fault is elsewhere.
  7. If the clutch does not engage, check for power to the clutch.
These steps might help find the problem.

Sep 16, 2013 | 1997 Ford Escort

1 Answer

Rover 25 1.4 2004 hot engine and radiator fan problem


Yes, it is possible to install a thermostat backwards, though unlikely. If the thermostat isn't opening properly, the hot engine coolant won't be flowing over the cooling fan switch and give you high temps. I would first determine if the thermostat was opening at all, and if it is, is it opening at the proper temp. I have had many new thermostats that, while new, didn't work correctly. To check the cooling fan motor, turn on the AC(if equipped) and the fan should engage. If no AC, disconnect the cooling fan switch, and the fan should engage. Check for power and ground at the fan motor. If you have both power and ground, the fan motor is faulty

Apr 21, 2013 | Cars & Trucks

1 Answer

1992 chevy C1500: Heat works on low speed, no medium, and high only works intermittantly.


On any other vehicle it sounds like the blower fan switch.
The fan switch provides power or ground to the resistor and there would be a high speed blower relay to bypass the resistor.
But in your case the fan switch is part of the controller.
I don't have a diagram for a 92 but the 94 model shows relays for low medium and high speeds. Each relay gets power from a fuseable link. The high relay gets power thru the low relay if the low relay is not engaged.
If you have the model with 3 relays you may need to check them.

Feb 01, 2013 | 1992 Chevrolet C1500

1 Answer

Air condition and heat won't work


Check to see if you are getting voltage to the blower motor if you are the motor is bad if not check the fan speed switch. 1 2 3 or low medium high if you get voltage going to the switch but not from replace the switch if you have voltage from switch check the blower motor resistor the although with the blower resistor you commonly have a high fan speed in the max setting and the lower speed settings don't work wich would make you think 1 2 3 are not working but 4 is. That is why it is best to check all parts to make sure the part you do replace needed to be replaced

Oct 15, 2012 | 2000 Ford Focus

1 Answer

Why wont my A/C Compressor and High Coolant Fans Engage?


Check for broken wiring, blown fuses, possible bad relays, and look at the pressure switch. Some systems have a high pressure switch (some have a low pressure also) that prevent the compressor from running. If it is faulty or damaged, it could be preventing the compressor from running. Wire damage could be possible with front end damage.

Apr 09, 2017 | 2001 Cadillac DeVille

1 Answer

Fan which blows heat doesn't work when toggle at dash board is moved to high.


When your fan switch is placed in the high position, it feeds directly to the fan motor and bypasses the blower motor relay. If the fan is operating on speed 1-3, then you have one of two things wrong, either you have a blown fuse, or the fan selector switch is faulty on the high setting.

Mar 29, 2011 | Geo Tracker Cars & Trucks

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