Question about Honda Cars & Trucks

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Evaporator coils freezing up

My heater blower motorstopped turning on. i replaced the resister and it worked for two days. thismorning, the blower motoer would not come on but got hot and there was a terrible smell like the ac was matbe leaking some kind of gas. it got down to 10 degrees (f) last night but i do know it had good antigfreeze.

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  • Levi Andre
    Levi Andre Nov 27, 2013

    so what would a shop check? What info would be needed to keep troubleshooting this?

  • Levi Andre
    Levi Andre Nov 27, 2013

    i replaced the blower motor before replacing the resister and it didn't fix the problem so I just returned it and kept the old one in there. is it possible that i should replace the blower motor anyway because it is working but faulty and drawing too much power?

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  • Honda Master
  • 20,706 Answers

No year, stated, nor model car. no engine size or country.

blown fuse.

there are lots of honda back to 1973, just a clue here.



if the heater blower stalled it can burn up.

what info, easy, the FSM , no FSM work blind

or use alldata.com , login and read, it .

smell from where, under hood or dash, gee?

the new resistor will stick until burned in, they smell like hot metal

and are. it just nichrome wire resistor and run very hot.

and are air cooled so the resistor dont burn up.

so a shop would make sure the motor (fan) is good first.

and make sure current is not over 15amps. motors can in fact

partially short and draw too much current not just go dead.

then the resistor, not first.



"but got hot" what got hot,. the cab air exiting the vents, the motor fan

or the what?

a dead fan, motor, check the motor, apply 12vdc to fan like the FSM shows and test the motor, if it spins fast,. check current.

ones that suck too much current run a little too slow. so.......

Posted on Dec 11, 2013

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Posted on Jan 02, 2017

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samson-1
  • 153 Answers

SOURCE: heater not working

The problem is probably the blower motor resistor. I'm not sure where yours is located exactly. They can be on the firewall under the hood or some are near the blower motor under the dash.

Posted on Dec 23, 2008

  • 899 Answers

SOURCE: Heater blower

you will need to get the blower motor change , it is drawing to much current and causing the wires to get hot

electech

Posted on Nov 25, 2008

dr_layinlow
  • 60 Answers

SOURCE: 99 dodge dakota has gas smell in cab when heater or ac is on

sounds like you need to look through the engine bay and see if your fuel lines are wet anywhere!! There might be a possibilty that you have a leak around the gas tank so jus crawl under the trunk and look to see if it has any kind of wetness around the tank or hoses coming out of the tank!!

Posted on Dec 10, 2008

  • 25 Answers

SOURCE: ac compressort had to be replaced because it

THE BLEND DOOR THAT CONTROLS HOT TO COLD SWITCHING IS STICKING. THE CONTORL HEAD IS ELECTRIC AND MAY BE CAUSING THE PROBLEM. HEAT AND AC ARE 2 COMPLETELY DIFFERENT SYSTEMS EXCEPT FOR THE CONTROLLER UNDER YOUR RADIO. HEATER COIL IS REALLY A HEATER CORE WHICH IS A LITTLE RADIATOR INSIDE THE CAR BEHIND THE DASHBOARD.

Posted on Mar 22, 2009

  • 47 Answers

SOURCE: 1993 cherokee limited 5.2 v8,runs hot when outside

Sounds like a bad water pump.

Posted on Jun 22, 2009

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1 Answer

I have a 99 dodge durango 5.9 there is barely any air coming out of any of my front vents. rear vents ok can feel it out the floor and defrost just not the ones on the dash.


The Dodge Durangos are known for blower motor problems. The blower motor is under the glove compartment/dash in the big black box, and so is the evaporator coil. There is a outside air filter that tends to wear out and break apart. Once this material breaks apart it ends up in the blower motor and can cause the motor to stop turning, or turn slower than normal. You will need to open the blower motor compartment under the dash and clean out any obstructions/trash and check the motor if it spins freely without much resistance. If it resists turning by hand or there is no trash and it still fails to work, you will need to replace this blower motor.

If the motor spins freely and there is no trash, you may just have a bad blower motor resistor or A/C control switch/panel.

Aug 23, 2011 | 1999 Dodge Durango

1 Answer

Need to locate the motor blower resistor for my 1999 mercury mountaineer, it has dual air, the resistor for the back is fine but the one in the front is bad and i cannot locate it. Please help.


If you have a manual system, you have a resistor. If electronic, you have a blower motor speed controller. Please rate if this helps.

here is info:

Control System Outputs-Manual A/C
Blower Motor Switch Resistor
The heater blower motor switch resistor has the following features:
  • The assembly is located on the evaporator housing in the engine compartment.
  • Three resistance elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the blower motor circuit to decrease or increase blower motor speed.
  • An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F) interrupting the blower motor operation in all speeds except HI.
  • The thermal limiter cannot be reset and is not serviceable.
Control System Outputs-EATC
Blower Motor Speed Control
The blower speed control is located on the evaporator housing in the engine compartment.
  • The function of the blower motor speed control is to convert low power signals from the electronic automatic temperature control module to a high current, variable ground feed for the blower motor (18527).
  • The blower motor speed is infinitely variable and is controlled by the electronic automatic temperature control module software.
  • A delay function provides a gradual increase or decrease in blower motor speed under all conditions.

Jan 10, 2011 | 1999 Mercury Mountaineer

1 Answer

My fan for the Ac and heater will not work. iam trying to replace the blower resister


the blower resistor is in the plenum... above the heater core.
If the blower motor does not work at all ... you may have a bad climate control switch.... or blown fuse even... as the resistor is a two stage coil... Low speed and medium speed... no resistor on High and would normally not go at the same time....

Sep 30, 2010 | 2004 GMC Envoy

1 Answer

After I drive my 1999 boxter the pasenger side exterior vent smells like a radiator and vapor comes out.


This is most likely leaking anti-freeze from the heater coil. Radiator Stop-Leak may help but replacement will likely be expensive. When replacing the heater coil, don't fail to rinse the plenum thoroughly. If you don't do this you will forever smell the anti-freeze....It does not evaporate ! That's why it is used. In the thirties and forties, alcohol was the anti-freeze of the day and it boiled off rapidly....results sere seized engine blocks or frozen systems. Thanks to DuPont for Prestone. Take care, Paul

Sep 07, 2010 | 1999 Porsche Boxster

1 Answer

Where is the blower resister on a 2004 crown victoria


very unusual location. usually inside the car in the plenum case by passenger floor, but here it is:


Blower Motor Switch Resistor
The heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing toward the center of the vehicle.
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • A device to prevent overheating (thermal limiter) will open the resistor coil when the temperature reaches 121°C (250°F) interrupting the blower motor operation in all speeds except HI.
  • The thermal limiter cannot be reset and is not serviceable.

Feb 19, 2010 | 2004 Ford Crown Victoria

1 Answer

1999 grand marquis were the blower motor resistor is located


this is for manual heater system. If you have electronic (digital display) you don't have one. Instead you have a blower motor speed controller.

here is info

Control System Outputs—Manual A/C
Blower Motor Switch Resistor
The heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing toward the center of the vehicle.
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating protective device (thermal limiter) will open the resistor coil when the temperature reaches 121°C (250°F) interrupting the blower motor operation in all speeds except HI.
  • The thermal limiter cannot be reset and is not serviceable.

Dec 12, 2009 | 1999 Mercury Villager

1 Answer

Blower motor doesn't blow anymore, This blows


If it blows only on high speed, it is the resister.
If it does not work at all, check fuses first. See owner manual for location.
Then check blower motor by jumping 12 volts from battery to blower motor. Make sure ground is jumped too.

If it works now, it's the control panel. If not, it is the motor.

Blower Motor —Front Removal and Installation
  1. Prepare the vehicle for blower motor (19805) removal.
    1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
    1. Remove the air cleaner assembly. For additional information, refer to Section 303-12 .
  1. Detach the speed control servo.
    1. Disconnect the electrical connector.
    1. Remove the bolt.
    1. Position the speed control servo aside.
  1. Position the coolant expansion tank/windshield washer reservoir aside.
    1. Remove the screws and the nuts.
    1. Position the coolant expansion tank/windshield washer reservoir aside.
  1. Remove the blower motor.
    1. Disconnect the vent hose.
    1. Disconnect the electrical connector.
    1. Remove the four screws.
    1. Remove the blower motor.
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Also,

Heater Blower Motor Switch Resistor(s)
The front heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing (19850) next to the blower motor assembly (19805).
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except high.
  • The thermal limiter cannot be reset and is not serviceable.

Aug 10, 2009 | 2001 Ford Explorer Sport

2 Answers

F150 2004 blower working only on high position.


this is because your blower motor resisters are burned out for speeds 1,2 & 3. High speed does not have a resister.

Replace the resister. If it goes a 2nd time, it is because your blower motor is failing & drawing too much current.

it is behind the glove box I think. It is in the plenum case where air blowing on it keeps it cool.

Easy repair. May need to access throught glove box which should open all the way down when you squeeze the sides in.

Go to tascafordparts.com for a discounted resister.
Please rate as solved problem if this is what you needed.

------------------------------------------------------------------------------
Manual Climate Control System Outputs
Blower Motor Switch Resistor
Blower Motor Resistor Coils 9ba1105.gif Blower Motor Thermal Limiter 47afe58.gif The heater blower motor switch resistor has the following features:
  • The assembly is located on the passenger side of the plenum assembly behind the glove compartment (06010).
  • Three resistance elements are mounted on the resistor board to provide four A/C blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except HI.
  • The thermal limiter cannot be reset and is not serviceable.

Mar 23, 2009 | 2004 Ford F150

1 Answer

Where is the heater blower resistor located


Blower Motor Resistor
The four-speed operation of the blower motor is achieved through the blower motor resistor. The blower motor resistor is mounted under the A/C evaporator/blower motor assembly.
-----------------------------------------------------------------------------------------------------------------

the heater blower resister is in the heater plenum under the dash on the passenger side. the resister is in the air stream to keep it cooled. it has 2 screws holding it in and a 3 or 4 wire connector on it. easy repair. buy resister from tascaford.com for 25% off.


Dec 06, 2008 | 1999 Mercury Villager

2 Answers

2005 G6


If the heater fan on your car only works on "High" the problem is more than likely the resister assembly in your blower circuit or poor connections at the resister assembly. When the switch is in the "high" position the current does not flow through the resister assembly it flows directly to the coil of the blower relay. When the switch is in "low", "medium 1", or "medium 2" position the current flows through 1, 2, or all 3 of the resistors in the resistor assembly which results in the 3 different lower speeds. Check the resister assembly and replace if needed. 

Nov 25, 2008 | 2006 Pontiac G6

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