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Blower works intermittenly.

Heater/AC inoperative. Blower works intermittently .

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Check for loose connection on electrical and vacuum leaks

Posted on Jan 03, 2014


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: heater/blower fan not working at all after intermittently working

Heater motor is prone to water damage when the small drain scuttle drain gets blocked (usually by leaves).
If the passenger footwell carpet is damp, that's probably the problem.
Worth checking regularly anyway, and/or remove the small cover over the drain which is part of the problem.
Remove the heater assembly (located over passenger footwell) and replace is the easy answer.
It is possible, depending on ability, to strip and repair.
New from Europarts around £130, used around £60.
Have fun!

Posted on Nov 19, 2008

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SOURCE: 1998 Astro Van Heater AC Blower only works on medium & Low

Yes, in high it bypasses the resistor and uses a high blower relay. But I think on 1998 Astro the High relay and the resistor are built together. It should be mounted in the blower box real close to the blower motor.

Posted on Mar 09, 2009

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SOURCE: Toyota Corolla AC/heater fan only works intermittently

I had the same problem on my 2004 Corrolla and ultimately it only worked on high. The dealer charged me $45 diagnostic fee and almost immediately told me it was a part called the blower resister. They knew the answer right there and then but only realesed it when I agreed to pay the diagnostic. They charged me 179.00 to fix the AC and later I found out the part cost $8.95 and a novice could have replaced it themselves.

Posted on May 04, 2009

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1999 Chevrolet Malibu just purchased with 90,804 miles on it. Heater fails to turn on, then intermittently after driving 15-20mins. While heater is inoperative, rear window defrost, AC & all power...

Wild guess a loose wire but occasionally hits the connection or shorts to a hot (12vdc) supply. Or a bad wire to "connector" connection. Intermittent problems are hard to solve. You will need to look carefully at the related controls and location to see if you can find what I describe. It is possible the problem is elsewhere in the wiring system. Just takes time to hunt down. Just purchased? from dealer? I'd take it back ask them to "hunt".
If from individual, that's probably why you got a "good?" deal. I'd still go back and ask them to fix, "nicely". You may get lucky and be able to find the problem. Sounds like issue is on the supply to the switches for all the problem devices. Could be as simple as a fuse or connections to this "circuit" to and or from the fuse. I'd start first with the fuse that serves this circuit. Fuse cover should tell you which fuse is for what device/s.
Hope this helps and it turns out simple.

Feb 27, 2015 | 1999 Chevrolet Malibu

1 Answer

Blower fan inop intermittent

Could be the blower motor resister is going bad or the a.c. fuse came loose,next time it happens,check fuse,pull out and reinstall.

Aug 22, 2012 | 2007 Buick LaCrosse CXL Sedan

1 Answer

Heater doesnt work

To troubleshoot this types of problem,click the link below :---
Car heater blowing warm, but not hot air?

Engine Overheats and heater blowing cold?

Heat blows cold on drivers side and hot on passenger side?

No heat on car?

Heater blows intermittently and temp gauge goes erratic?

Heater blows cold?

Heater/AC blower motor not working?

A/C, heater, defroster fan, not working? Heater problem?


This will help.Thanks.

Mar 27, 2012 | 1994 Volvo 960

3 Answers

99 Buick LeSabre, Heater/AC blower kicks in and out. Works intermittenly. Is it the blower motor, relay, of resistor?

most likely it's the switch.

Please see my tip at . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Oct 27, 2010 | 1999 Buick LeSabre

2 Answers

AC blower motor switch inop

You may have a vacuum line disconnected. check your engine and listen for the hissing of the vacuum line.

May 28, 2009 | 1990 Ford Econoline

1 Answer

AC blower motor switch inop

the switch is blown. you will need to replace this resistor switch asap.

May 28, 2009 | 1990 Ford F150

1 Answer

Heater ac blower inop and only cold air blows on passenger side.

The blower problem on your jeep needs proper diagnosis. This could be one of several problems.
As simple as a relay or as big as a blower motor. With automatic temperature control you could be looking at a control assembly.

the cold air on the passenger side is a passenger blend door problem. Could be the actuator or a broken door. This problem requires removal of the entire dash to get to the problem. Not something you want to tackle without a complete step by step set of instructions.

I do have one other suggestion for this problem. You will still have to get the blower problem to complete the repair. Copy this link and go see what you think about blend door repair.

Best Wishes
Good luck

Mar 31, 2009 | 2000 Jeep Grand Cherokee

2 Answers

1998 Astro Van Heater AC Blower only works on medium & Low

Yes, in high it bypasses the resistor and uses a high blower relay. But I think on 1998 Astro the High relay and the resistor are built together. It should be mounted in the blower box real close to the blower motor.

Mar 09, 2009 | 1998 Chevrolet Astro

1 Answer

Heater/ a/c blower

There is a 30 amp fuse for the blower. The blower motor resistor could be bad.

Nov 11, 2008 | 2004 Jeep Grand Cherokee

1 Answer

Blower motor inop

if it only works on hi...the resister is bad on regular ac heater systems or on auto temp control systems the powern module is bad.....if it is totally inop then likely a fuse or bad motor

Sep 05, 2008 | 1996 Jeep Grand Cherokee

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