Question about 2004 Ford F150

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Heater and air conditioning do not turn on. The fuse is ok. But no power to either unit.

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If the fuse is good, then there could be a wiring harness problem. You can check whether the power is not coming to fuse or after the fuse.

Posted on Jun 06, 2010

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the ac and heat are two seperate units, the heater hoses are coming from the heater may be loose or cracked check your fuses and relay switches

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Heat and air conditioning does not work.


say what dont work.
ok the blower blows, and for sure on high.
so what do you want , and where.
heat to cab?
cold air conditioning to cab?
does not work, ok
lets do 1. no heat to cab,
blow fuse is 1st . check all fuse. (see glove box operators guide)
if no heat:
check engine heat, is it 180F and holding
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if both are hot you have heat to the core and is a damper failure
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Why my ac/ heater it's not blowing not air at all but everything else seems to be ok on my 1997 e320 Mercedes Benz


your air conditioning unit has a gas cannister which eventually runs out. You will need to get this re-filled. Check ou yellow pages or on line for air conditioning services. Prices vary.

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1992 Dodge Dakota 2wd 3.9L V6 Air conditioning/Heater dosent blow? when i turn the air or the heat on i can hear the compressor kick on but it dosen't blow cold or hot? any help would be appreciated


Roger it sounds like the blower motor is not comming on. There is a resistor network located in the engine compartment on the passenger side mounted to the firewall, that controlls the blower motor. The connections may have corroted or the unit itself is bad. That was the first thing I had to relpace when I got my used 92 Dakota. There is also a 30 amp fuse in the fuse box under the dash board . If that is blown I would suspect the blower motor is seized up or just pulling too much power.

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I have a 1993 VW Passat VR6, My problem is when I try to start it, I have no spark from the spark plugs..What could be the problem or how do I fix this?????


GO TO THIS SiTE TO CHECK THE FUSE BOX!
http://vwtech.no-ip.info/images/golf/post90.gif

This are the FUSE and RELAY number SLOT!
Fuse No. Description Ampere Rating 1 Headlight, low beam, left 10 2 Headlight, low beam, right 10 3 Instrument panel lights, license plate lights 10 4 Glove compartment light 15 5 Wiper/washer 15 6 Fresh air blower 16-valve only: Air conditioning 20 7 Taillights, side marker light, right 10 8 Taillights, side marker light, left 0 9 Rear window defogger 20 10 2.0 16-valve only: Fog lights 15 11 Headlight, high beam, left,High beam indicator light 10 12 Headlight, high beam, right 10 13 Horn 16-valve only: Radiator cooling fan 10 14 Back-up lights, washer nozzle heaters 10 15 2.0 16-valve only: Engine electronics, stabilizer valve, cold start valve 10 16 Instrument panel warning lights, 16-valve only: Multi function indicator 15 17 Emergency flasher switch, turn signals 10 18 Fuel pump, oxygen sensor heater 20 19 Radiator cooling fan, air conditioning 30 20 Brake lights, cruise control 10 21 Interior lights, digital clock 16-valve only: Luggage compartment light,multi function indicator, central locking 15 22 Radio, cigarette lighter 10
Relays Relay No. Description 1 Air conditioning 2 Open 3 Digifant control unit 4 Load reduction relay 5 Low coolant level control unit or Open 6 Emergency flashers 7 Rear Wiper 8 Intermittent wipers 9 Seat belt warning system control unit (possibly headlight warning too?) 10 Fog lights 11 Horn 12 Fuel pump (except diesel)Glow plugs (diesel) 13 Radiator cooling fan after run (except 16-valve)2.0 16-valve: Starter interlock relay 14 Automatic trans., coolant temperature indicator,starter interlock relay (except 2.0 16-valve)2.0 16-valve: Radiator cooling fan after run 15 ABS pump relay 16 ABS relay 17 Heated seat control unit, driver 18 Heated seat control unit, passenger, or power seat circuit breaker 19 Automatic transmission 20 Open 21 Power window relay, ABS hydraulic pump fuse 22 ABS valves fuse 23 Air conditioning, power seat fuse 24 Power window fuse

Nov 17, 2010 | 1993 Volkswagen Passat

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The air conditioning is blowing hot air and the rear air is saying that it is off when the power is turned on to the unit. It is a 2004 Buick Rainier.


The control head may have some issues,this model does,but there is a possible chance the actuator motor that controls the temp door is most likely not working.

Aug 15, 2010 | 2004 Buick Rainier

1 Answer

My air conditioning and heater work but my air conditioning/ heater fan does not turn on


You need to get to your fan and test the resistance on the fan harness. If that checks out OK I would look at the switch. I am surfe you have already checked the fuse.

Aug 04, 2010 | 1998 Toyota Corolla

1 Answer

Hearter core removal


  1. Disconnect the negative (-) battery cable.
  2. Drain the engine coolant into a suitable container.


CAUTION When draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
  1. Disconnect the heater hoses. Be careful not to damage the core by pulling on the hose to remove. Cut the hoses if they will not come off easily.
  2. Remove the instrument panel.
  3. Disconnect the resistor assembly.
  4. If possible, disconnect and move the duct (non air conditioning) or the evaporator housing (air conditioning) to the right to gain clearance for the heater unit. If equipped with air conditioning, do not disconnect air conditioning system until absolutely necessary. Refer to for discharging, evacuating and recharging the system.
  5. Remove the instrument panel stay and heater unit.
  6. Disassemble the heater unit by removing the duct, mode control case, core assembly and heater core.

To install:
  1. Assemble the heater unit by installing the duct, mode control case, core assembly and heater core.
  2. Install the heater unit and instrument panel stay.
  3. Connect the duct (non air conditioning) or the evaporator housing (air conditioning) to the heater unit. Evacuate and recharge the air conditioning system if the system was discharged to remove the evaporator assembly.
  4. Connect the resistor assembly.
  5. Install the instrument panel as outlined in this section.
  6. Connect the heater hoses. Be careful not to damage the core by pulling on the hose.
  7. Refill the engine coolant into a suitable container.
  8. Connect the negative (-) battery cable and check for leaks.

Jan 20, 2010 | 1996 Isuzu Trooper

1 Answer

Heater not working on Nissan Terrano 2 (N reg)


Test the blower motor speed control module and if it is ok test the motor by jumping 12 volts to it.

Nov 30, 2008 | 1995 Nissan Pathfinder

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