Question about 2003 Chevrolet Silverado 1500

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I have changed the resister the blower motor the blend doors the heater will not blow air or work at all i also change the heater dash panel looks like the fuses that i can find all seem to look good there was a tago switchthat was hooked up that would make the blower motor work i also change water pump and thermostat still over heating slowly breaking the bank on this thing please help if you can

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  • Chevrolet Expert
  • 284 Answers

Relays go bad also. Try to sway relay with another relay next to it. May have been the relay all along.

Posted on Jan 19, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

shaggyrat
  • 1224 Answers

SOURCE: fuse blows when air conditioner is turned on

there is a loose ground and or wrong size fuses for the air
if loose ground you will want to have a certified mechanic trace the grounds back to source
i dont think it could be relay but there is a way to check this
find the relay panel in the engine compartment open it
find the relay that says air conditioning
pull it out
now there are numbers on that relay
in that same relay box theres relays about 6 to 8 of them that look similar to the air conditioning relay
this is where the numbers come in if the numbers match switch with other relays
mark the air conditioning relay with black marker or nail polish so you know which relay is which
if its the relay thats bad the new relay from the relay box put in its place will work fine
put the old one back in the slot where you took out the other relay out of and then proceed to dealer to purchase new relay for your vehicle if the relay was the problem

Posted on May 21, 2008

  • 31 Answers

SOURCE: 2000 cavelier a/c works but

check for power at motor or simply tap with hammer a few times the humidity makes the motor stick

Posted on Jul 20, 2008

  • 1 Answer

SOURCE: BLOWER MOTOR ON 2004 AVALANCHE IS SLOWLY PUMPING OUT AIR

it may not be the blower motor. it may be the blower motor control module which use to be the resistor. it's located under the pas. side. remove the black coyer , 2 scaews above the pas. foot area. then remove the blach unit that has a purple wire going to the back of the motor on the right. price about 140 dollar with tax.

Posted on Jul 30, 2009

  • 1 Answer

SOURCE: 01 silverado blend door changed /now works back wards!!!

were the a/c blend door is located in 2002 chevy silverado

Posted on Mar 05, 2010

  • 3072 Answers

SOURCE: 97 Blazer - no heat

http://www.autoandfleetrepair.com/Car_Heater_Not_Working_Blowing_Cold_Air.html

Posted on Nov 06, 2010

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08 dodge nitro blows hot air on passenger side but cold air out the drivers side!! Any answers




NOTE: LHD model shown. RHD model similar. All vehicles are equipped with a common heater, ventilation and air conditioning (HVAC) housing assembly (1). The heating-A/C system combines A/C, heating, and ventilating capabilities in a single HVAC housing mounted within the passenger compartment behind the instrument panel. The HVAC housing assembly includes:
  1. Mode-air doors (2)
  2. A/C evaporator (3)
  3. Recirculation door actuator (4)
  4. Air inlet housing (5)
  5. Recirculation-air door (6)
  6. Blower motor (7)
  7. Blower motor resistor (8)
  8. Heater core (9)
  9. Air distribution housing (10)
  10. Blend-air door (11)
  11. Blend door actuator (12
  12. Floor distribution ducts (13)
  13. Mode door actuator (14)

Jan 28, 2015 | 2008 Dodge Nitro

1 Answer

Intermittent cooling from the air conditioning


If you want a quick check of the blend door system,clamp off the heater hoses,as you would if you were changing a heater core and drive as you would.Do not disconnect them,just clamp them.
Also,don't over look air flow through the a/c condenser at the front,any restriction of air flow or a slow fan or only one running of 2 when 2 are needed?

Apr 29, 2017 | 2000 GMC Sierra

2 Answers

Heater blowing out cold air


Several things.
If the heater hoses are hot, the problem could be a blend door under the dash. The blend doors direct air thru the heater core and out the vents.

Jan 24, 2013 | 2005 Dodge Caravan

1 Answer

Heater blows cold air


Air Temperature Control Blend Door Failure No Heat

In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.

Nov 01, 2012 | Pontiac Cars & Trucks

2 Answers

A/C will only blow through defrost vents


Common question on this site. On late model cars, the vents are controlled by blend door motors. Small electric motors open and close doors to direct air flow.
Chances are you have a blend door that is stuck or a failed motor.
The default position is the defrost to make sure the windshield is always clear.
Someone will need to look behind the dash to see if all of the doors will move on demand.

Jun 27, 2012 | 2006 Acura TSX

1 Answer

Replaced blower motor and resistor, also heater core and thermastat, and control panel in dash, still only cold air blows out.


most likely your problem is the temp blend door actuator it is a motor that moves a door in heater case to adjust temp

Dec 24, 2010 | 1997 Chevrolet Cavalier

1 Answer

My heater only blows out cold air. When I first turn it on it blows out hot air for about 3 seconds then it turns to cold air. I have flushed the system twice, and that didn't work so I changed the...


check the vacuum lines going to the h-vac (under the dash where the blower motor is) make sure there are no vacuum leaks if there are no leaks start checking the blend door acuators firts locate all of them then start looking for the one that closes and opens the cold and hot blend door. turn the nob to heat and the other one to panel (not a/c panel just air) then if your not sure which one controls the hot and cold blend door start checking to see which acuator has vucuum going to them if there is vucmuum going to them but the acuator does not move replace it.but if it does compress take the rod lose from the blend door and see if the door in side the box is broken. if is not replace the climate controler on the dash. i hope this helps.

Nov 08, 2009 | Dodge Ram 1500 Cars & Trucks

2 Answers

When i have the heater/defroster on the heater below blows cold air while the defrost blows hot. when i switch to just defrost the bottom heater stays on and blows cold air. when i have front dash and...


It sounds like you have a blend air door stuck. This is in the housing of the heater a/c blower unit under the passenger side of the dash. There is a motor on the top of the housing that could possibly be stuck or on working.

May 10, 2009 | 2003 Dodge Durango

1 Answer

Aircondition blows hot air on normal but blows cold air on max


The temp blend door rotates between allowing heat through the heater core, or cold air through the a/cevaporator, or a blending of the 2 by being anywhere between the two.

I would check the heater a/c control head first and hope it's just the control head.
----------------
here is a descripton of the system.

Section 12-03A: Air Conditioning, Heater System, Manual, Ranger and Explorer 1996 Ranger and Explorer Workshop Manual
DESCRIPTION AND OPERATION A/C-Heater System, Manual The manual air conditioning/heater system used in these vehicles is a split-case, blend air design. This design includes the following major components:
  • An A/C evaporator housing (19850) which is attached to the engine compartment side of the dash panel (01610). This assembly includes: (1) the A/C evaporator core (19860), (2) the suction accumulator/drier (19C836), (3) the A/C cycling switch (19E561), (4) an internal, A/C evaporator core orifice (19D990) located inside the inlet line to the A/C evaporator core, (5) a blower motor (18527), (6) a blower motor wheel (18504), (7) a heater blower motor switch resistor (18591), and (8) the A/C evaporator case (19897).
  • A heater air plenum chamber (18471) which attaches to the passenger compartment side of the dash panel. This assembly includes: (1) the outside/recirculating air inlet door, (2) the panel door, (3) the floor defrost door, (4) the temperature blend door, and (5) the heater core (18476).
  • Other components which link and/or control the heating and air conditioning systems include: (1) the A/C control (19980), (2) the ducts and registers, (3) the windshield defroster hose nozzle (18490), (4) the control cables, (5) the vacuum lines, (6) the refrigerant tubes and hoses, (7) the A/C compressor (19703), and (8) the A/C condenser core (19712).
050240f.gif
The A/C control (19980) assembly consists of three main parts:
  • The function selector knob, a vacuum selector valve combined with an internal electrical switch.
  • Heater blower motor switch (18578), an electrical switch that provides four speeds of A/C blower motor operation.
  • A temperature control knob, which controls the position of the temperature blend door mounted on A/C evaporator housing (19850) assembly.
---------------------------
Temperature Control
The temperature selector actuates a variable resistance switch. This switch varies the voltage to an electric actuator used to position the temperature blend door. Positioning the temperature control in any position between COOL and WARM causes the temperature blend door to direct more or less outside air through or around the heater core (18476) for whatever proportion of heated or unheated outside air is desired. The air blends together as it leaves the heater core and enters the heater air plenum chamber (18471) for distribution.
---------------------------
System Airflow Description Air is drawn into the system by the blower motor (18527) through the outside-recirc. door opening. The air is blown through the A/C evaporator core (19860) and then the heater core (18476) (when the temperature control is moved toward the WARM position). When the temperature blend door is in the maximum COOL position, the air bypasses the heater core. When the temperature control is moved to the right, away from the maximum COOL position, air passes through the heater core where it is warmed, and then mixed with the cool air before it is discharged through the registers. OFF
With the function selector in the OFF position, the outside-recirc. door is in the recirculated air position. It is closed to outside air and no air passes through the system. The blower motor is off. MAX A/C
NOTE: No temperature modulation is possible in the MAX A/C position.

In the MAX A/C position, the outside-recirc. air door is in the recirculated air position. All of the air discharges through the panel registers except for a small amount of floor bleed. The A/C compressor (19703) operates in this function control setting.
--------------------------------
You have to almost remove the dash to get this part out.
Removal
  1. Disconnect battery ground cable.
  1. NOTE: Refer to Section 01-12 for instrument panel removal and installation procedure.

    Loosen instrument panel (04320) and pull back from cowl.
  1. Remove A/C electronic door actuator motor electrical connector from bracket on A/C evaporator housing.
  1. Remove three A/C electronic door actuator motor retaining screws.
  1. NOTE: The mounting bracket remains in place on the A/C evaporator housing.

    Lift A/C electronic door actuator motor vertically approximately 12mm (1/2 inch) to disengage it from bracket and actuator shaft, then pull A/C electronic door actuator motor back toward passenger compartment.
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Apr 25, 2009 | 1996 Ford Explorer

5 Answers

Blower not blowing


can you hear the fan working on all speeds?

Sep 22, 2008 | 2002 Jeep Grand Cherokee

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