Question about 2000 Hyundai Elantra

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I have a 2002 Elantra. Yestreday the lower fan speeds on the air conditioner fan stopped working (positions 1,2,3). The High speed (position 4) works. Any ideas how to correct?

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The blower motor resistors or fan switch itself are defective.
High speed has no resistors B+ goes straight to blower motor.

Posted on Jun 03, 2010

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You should check the blower resistor pack and replace it if necessary. Here is an example that may help you to understand its role.

http://www.youtube.com/watch?v=krbIlqbXQbo

Posted on Nov 28, 2013

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I am having the same issue with my '02 Santa Fe with Automatic Climate control. The problem lies in the blower motor "Transistor". These Auto-Climate models have a 3-prong plug transistor and the part cost about 3x ($100) what a 4-prong 'resistor' (for regular motor controls) runs. It is located in the top of the blower motor box, usually behind the glove box.

Posted on Dec 28, 2011

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Related Questions:

1 Answer

Why does the air conditioner on my 2003 nissan altima only work on position 4?


If you mean the blower only works on high, it could be the resistor that cuts down the power for the other speeds.

Jul 07, 2013 | Cars & Trucks

2 Answers

Blower fan low speeds don't work. Can only get the fan to work on position 3 which is too high. What might have happened such that positions 1, and 2 don't work?


it is the blower motor resistor. I do not know off of the top of my head if it is part of the climate control unit or external for your particular vehicle. However the symptoms match.

Feb 21, 2011 | 2001 GMC Yukon XL

1 Answer

Honda Accord 2002 heater blower control works only in the high position. The 1, 2, and 3 positions do not work but the high (4) does.


The heater blower is normally controlled by voltage sent to the blower via a resistor network.
In this case it seems that this unit also called the fan resistor is defective.
I assume that 4 is the position where the blower is running HIGH and in this position the blower is powered directly without using resistor for lowering the speed of the blower. In step 1 - 3 the blower is powered via the mentioned resistor network.

In my opinion the resistor network is defective.
Replace it !!!!.

Jan 31, 2011 | 2002 Honda Accord

1 Answer

The air conditioner fan in my 2002 Dodge Caravan 3.8 liter engine only works on the high speed. The fan will not work at the lower speeds. What could cause this problem and how can I fix it?


If you can access the switch contacts Clean them . They become coroded or out of contact with moisture condensation and gunk sometimes

see if you can get access through dashboard

Jun 08, 2010 | 2002 Dodge Grand Caravan

2 Answers

2001 Jeep Wrangler heater blower stopped working


Yes I would go with the switch, BUT, does it have a resistor bank? That is, how does it reduce the speed? Many systems use resistors to lower the speed. Burnt or bad connections can cause this as well.
You can test the blower motor by connecting direct power from a source like the cigarette lighter if you are handy.
Most of the time the lower speeds konk out but the high speed continues to work this is the resistor bank that goes out.

Mar 25, 2010 | 2001 Jeep Wrangler

1 Answer

Heater fan only works on "high speed"


All cars are designed with a blower fan motor that pushes air through the ventilation system. This air is processed by a series of vents to direct the air to various positions. Example: heater, air conditioner and defrost modes. Most blower motors are power by a basic electrical circuit that utilizes a multi resistor or a solid-state resistor to control different fan speed modes (low, medium low, medium and high). If the resistor malfunctions it may lose one or more of the lower fan speed settings.
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Mar 02, 2010 | 1999 Buick Century

1 Answer

2000 v6 5 spd nissan xterra idles high when in gear and rolling .


From the service manual:

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
NGEC0549
PREPARATION
NGEC0549S01
1) Make sure that the following parts are in good order.
I Battery
I Ignition system
I Engine oil and coolant levels
I Fuses
I ECM harness connector
I Vacuum hoses
I Air intake system
(Oil filler cap, oil level gauge, etc.)
I Fuel pressure
I Engine compression
I EGR valve operation (If so equipped)
I Throttle valve
I Evaporative emission system
2) On air conditioner equipped models, checks should be carried out while the air conditioner is OFF.
3) On automatic transmission equipped models, when checking idle rpm, ignition timing and mixture ratio,
checks should be carried out while shift lever is in “N” position.
4) When measuring “CO” percentage, insert probe more than 40 cm (15.7 in) into tail pipe.
5) Turn off headlamps, heater blower, rear defogger.
6) Keep front wheels pointed straight ahead.
7) Make the check after the cooling fan has stopped.

SEF976U
3. Open engine hood and run engine at about 2,000 rpm for about 2 minutes under no-load.
SEF977U
4. Perform diagnostic test mode II (Self-diagnostic results). Refer to EC-644.
SEF217U
OK or NG
OK ' GO TO 2.
NG ' 1. Repair or replace components as necessary.
2. GO TO 2.
BASIC SERVICE PROCEDURE VG33E
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)
EC-616
2 CHECK IGNITION TIMING
1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.
SEF978U
3. Turn off engine and disconnect throttle position sensor harness connector.
SEF975R
4. Start and rev engine (2,000 - 3,000 rpm) two or three times under no-load, then run at idle speed.
5. Check ignition timing with a timing light.
SEF371S
15°±2° BTDC (in “P” or “N” position)
OK or NG
OK ' GO TO 4.
NG ' GO TO 3.
GI
MA
EM
LC
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
BASIC SERVICE PROCEDURE VG33E
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)
EC-617
3 ADJUST IGNITION TIMING
1. Adjust ignition timing by turning distributor after loosening securing bolts.
2. Turn off engine and connect throttle position sensor harness connector to throttle position sensor.
SEF972R
' GO TO 2.
4 CHECK BASE IDLE SPEED
With CONSULT-II
1. Read idle speed in “DATA MONITOR” mode with CONSULT-II.
PEF356V
700±50 rpm (in “P” or “N” position)
Without CONSULT-II
1. Check idle speed.
700±50 rpm (in “P” or “N” position)
OK or NG
OK ' GO TO 6.
NG ' GO TO 5.

Mar 25, 2009 | 2000 Nissan Xterra

1 Answer

Heater fan only works on high on my 2002 Avalanche


If your Chevy is equipped like most vehicles, the speed control is accomplished by a stepped or tapped resistor that has now failed. This may be located on the fire wall under the hood or near the blower assembly under the dash. When these resistors go 'open' inside, it will only affect the lower speeds since the fastest speed bypasses the resistor completely. Can't say how hard yours is to access but the part is pretty itself is cheap, guess that's why they fail so often.

Feb 19, 2009 | 2002 Chevrolet Avalanche

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