Question about 2005 Ford Focus

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Blower motor Doesn't matter what speed the switch is on, it only runs for a couple of seconds and then starts to slow down until it stops. If u switch it to 0 and wait a minute or two and turn it back on, it will run again for about 20 to 30 seconds and then starts to slow down and stop again. Keeps repeating over and over

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  • Leon corns
    Leon corns Nov 23, 2013

    It was the blower motor

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  • Expert
  • 202 Answers

May be motor on way out ,,,,, the resistor for the system usually allows full blower power when set to top speed,,,,

Posted on Nov 23, 2013

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6ya6ya
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Posted on Jan 02, 2017

emissionwiz
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SOURCE: My 1991 Ford Escort GT

Check the timing, if it is way off the belt has jumped and the cam is out of time, also are there any burn marks on the insulators of the spark plug wires that go down into the head?? that is a common problem, If the car is a hig miler then replace the wires with a high quality set, don't use cheapo wire sets.One other thing make sure the rubber intake hose is properly connect to the MAF sensor and intake throttle body and has no cracks or leaks

Posted on Jul 31, 2008

  • 1201 Answers

SOURCE: 2002 F-150 blower motor stopped working.

There are 4 things to check out to pin point the problem: the switch it's self, the blower relay switch, resistor block, and the blower motor it's self. good luck

Posted on Jan 21, 2009

  • 105 Answers

SOURCE: vehicle shuts off sometimes when stopping

Set your idle speed to mfg recomindation if that doesnt help check the dash pot that is what keeps the engine from stalling at sudden speed reduction

Posted on Mar 15, 2009

gabndan2
  • 35 Answers

SOURCE: No oil Pressure, with knock. then oil pressure returns after turning off engine for a few minutes and cranking back up again.

is oil filter clogged???

Posted on Jun 01, 2009

  • 200 Answers

SOURCE: Headlights go off after a few minutes of

Brake light are on a different circuit with the dash panel and parking lights. There often is a resetable temperature breaker in the light switch. This protects against high current. Are the bulbs standard? Was the car ever hit in the front? Can you try unplugging one lamp at a time and see if one is causing the over current? If the light switch is on the steering column lever then it's probably controlling a relay. The problem could be in the relay.

Posted on Feb 05, 2010

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1 Answer

2002 grand caravan blower motor intermittent replaced resistor


in review
the fan speed resistor is new
you bench tested the blower motor
12 volts test ..only runs it at full speed
if cabin filer want changed the blower motor would run hotter

could be the motor brushes or bush/motor bearing when slowed
you might want to inspect the brushes and clean the dust out of the motor
if no better
does that have climate control ?
might be the fan switch itself or the earth isnt so good

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Apr 01, 2017 | 2000 Dodge Grand Caravan

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Blower fan not working


The resistor bank is bad for slow speeds, the switch is bad for high speed. In your test, you have voltage, but the switch wont carry the amps, to run high speed. Open circuits will not blow fuses. Replace both switch and resistor bank for all speeds. Make sure to clean leaves and trash from fan housing and see if fan spins freely.

May 17, 2017 | Cars & Trucks

2 Answers

I have 91 Toyota camry & just recently my fan blower on works on high, the medium and low functions don't work. Is there something wrong with my fan blower?


No.

Probably not. If it runs on high, it is probably good.
Unless is sounds slow or 'tight' on high, or squeaks or chips , etc. Run the fan with the engine off and then shut the fan off and listen and see if you can hear how long it takes to slow down. If it stops in just a second or two, the bearings are tight (dry). If it spins down normally, maybe three to eight seconds or more, the motor is fine. You really don't need this check.

It is most likely your blower relay.
Most cars have one or two relays to control the fan motor, which is a single speed motor that the relays and speed switch and blower resistor control the power to.

One relay is for high speed, also switch contact.
One relay is for other speeds and divert current through a blower resistor located by the fan duct under the dash or under the hiid by the fan.
Also the switch contacts for each speed.

It cad be the dash switch, which has to handle the blower resistor current for all the lower speeds is burned out at those speeds.
It can be the low speed blower relay, as I mention above, is burned out, this is most frequent cause.
it can be the blower resistor is burned out, this can give no low speeds, or loose speeds below a certain speed setting.

Try you manual for the blower relays' positions. Try swapping with the horn relay to test if it is the same type of relay.
Take out the blower resistor carefully (pretend you are defusing a bomb or playing "operation" game as it has exposed coils that are delicate and if you bump the sides of the opening as you extract it you will damage it and short the coils against each other). the wire coils are very fine bare wire coils that look like springs and if touching can burn out.
Switch is harder to test because hard to get at, check the other things first.
You should be able to test for voltages at the resistor plug to see if power is coming from the switch, but wiring schemes can vary.
Post back or use shop manual to troubleshoot the switch.

Oct 29, 2010 | 1991 Toyota Camry

1 Answer

Heter blower is 50 - 50 to work or not from start up. 'if' it comes on it works for minutes, it will slow down as engine speed increases, back to full when clutch dipped to change gear, then slows down...


Items to check with blower motor:
First there is NO correlation to engine speed and blower motor.
Blower motor may be dying, Blower resistors are defective, on/off switch.
If there is no voltage to the reverse switch, then you have to back probe that wire and see where the open is.
The answer to your question yes there is a common connection. Probably at the fuse box. Like I said earlier you have to back probe wire to reverse switch and find out where it is open. Good luck

Jun 17, 2010 | 1998 Audi A4

1 Answer

The blower in my 2002 Malibu isn't working right. It will work at first and then slows down until it eventually turns off. If I turn it off for a while and then turn it back on, it will work and then run...


It could be caused by the fan bearings failing (normally sleeve types that get gummy), switch failing (does speed setting make any difference?) or finally connector problems caused by corrosion.
If the speed selection resistor was failing, it would affect lower speeds but not the highest speed since it is then bypassed.
Operating the switch that selects fan speed rather roughly could clean the contacts in the switch and help cure the problem if the switch is at fault.
If the fan motor slows down regardless of speed setting, it is likely the motor (bearings) at fault which would likely require replacement of the fan. Access to the fan may be a real pain-in-the-. . . well, you know.

Feb 16, 2010 | 2002 Chevrolet Malibu

2 Answers

Heayer doesn't work


The resistors provide resistance in the circuit, dropping voltage to the blower motor to slow the motor speed down. On high, the blower receives full voltage through the blower relay.

If you had High but no other speeds, then the resistor pack is usually the culprit. If you have all other speeds but high, the most common problem is going to be the blower motor itself, relay, or the switch panel.

You can check this by turning the fan speed to "high", unplug the blower motor, and check to see that you have roughly at least 12v at the plug. If you have 12v, that means the switch panel is activating the relay and the relay is working. Over time, heat kills the magnetic properties of the magnets inside an electrical motor. Without enough magnetic energy, you may not get enough opposing force to spin the rotor full speed when the windings energize, but still enough to spin at lower speeds.

Another thing you can check is the connector at the blower motor and the switch panel. Sometimes these will heat up, start to deform, and cause a bad connection. The bad connection may be able to handle the lower current draw on low speeds, but the higher resistance from the bad connection won't be able to handle the higher current while in the full speed position.

Hope this helps, keep me posted. be glad to help you get your heater working again soon.

Jan 07, 2010 | 1995 Chevrolet Tahoe

2 Answers

Heater blower motor blows normal then slows down 1999 grand marquis


There is a blower resister within the blower fan that is replacable. Most likely this is the problem

Jan 04, 2010 | 1999 Mercury Grand Marquis

1 Answer

The blower motor whines,is slow to start up or doesn't run at all


The sad news is that the new motor will probably whine also. The best way to fix the whine is to use the switch to select different speeds. It is is whining at one speed, it usually will not whine at a different speed, at least for a while, or until you turn a corner.
Speed issues are usually related to the switches resistor pack which is easy to replace.

Jan 01, 2010 | 1994 Volvo 850

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