Ford A/C :: 1988 - Front Blower Motor Intermittently Works
Jul 27, 2010
My mom has a 1988 350 Econoline van chasis that is a motorhome class C.
The front heater/AC blower motor only works when it wants to. It starts very intermittently and then shuts off then you go down the road a little more and it comes back on, it will do the same thing sitting in the driveway just idling. There is no timing it, it just turns on when it wants to and then back off again.
I checked the fuses and the fuses are fine. The blower motor when hooked up directly to the battery blows fine. When it isnt working of course there is no juice going to the blower motor through the hotwire of the blower motor, I have checked this with my volt meter.
I did replace the switch that turns the blower on in the dahs, and it didnt do the trick.
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So for a few months now, my car has been making a subtle clicking noise whenever I have the ac or heat on, kind of similar to the noise spokes on a bike would make when children put a card in them. The noise increases/decreases in speed as I adjust the ac/heater speed.
Recently though, it's gotten to a point where sometimes, the blower motor would completely stop working. I can still feel heat and cold coming through the vents when I turn the AC on, but the it doesn't always blow air. I've noticed that sometimes when I hit a bump in the road, it starts working again. It works at all settings and all temperatures perfectly (when it's working that is).
How should I proceed? I don't know much about cars, but from what I've seen on the internet, it doesn't seem too difficult to replace the blower motor. I just want to be sure that the blower motor is indeed the cause, because I don't want to install a new one to be disappointed when I turn it on and still have the same issue. And winter is just around the corner so I would love to get this taken care of.
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My wife has a 06 Sonata with the Manual AC controls. The blower motor works intermittently. Sometimes it works, other times it does not. It does not matter which setting the HVAC is in. Yesterday while driving it, we went over a bump in the road and the motor started running again. Since the motor runs, I want to discount the fuse and relay.
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Front Blower Motor does not work. 2005 Honda Odyssey, EX-L130,000 miles and I expect at least 170,000 miles more.
History – Over the past four years, the front blower motor has operated intermittently. I noticed that when the weather went through large changes (warm/humid to cold/dry or vice versa), the fbm would not run. The system behaved in the manner described by Honda owners in many of the forums online. After a period of time passed, the blower would function properly again until the next weather change.
About two months ago, the blower stopped working again and it has not returned to form since. The system again displays all the usual symptoms reported on-line. The rear blower works fine.
The controls on the dash seem to be fine (display changes appropriately as I select settings, vents open and close for heat or A/C or which vents I want open). Air flows through the vents selected when I am driving – I have a passive windshield defroster!
Here are the steps that I have taken during the past week:
1.Bought a new transistor/resistor module, OEM Honda Part #79330-SDG-W41 (I checked with a local dealer for the correct part number). I installed it but there is no change in the system.
2.I found information on-line to test the T/R. I checked the old one – Thermal Cut Out is intact and the resistance between posts 3 & 4 (lower pair when installed) is 1,500 ohms. I checked the new transistor and it read out the same.
3.Fuses, relays, power to the blower, blower, ground beyond the transistor are all fine.
4.I reconnected the T/R and fbm and let the fbm lay on the car floor. I started the car with the fan on. Each time I start the car (or turned the ignition ‘On’) the fbm tries to run, but stops in an instant.
The Rat is cornered – it's in the the T/R and the control signal from the control panel to the T/R corner. If I bypass these elements, the fbm goes on and off as I select the fan On/Off from the control panel.
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I don't know if its a coincidence but it rained hard all weekend and went to work this morning to find out the blower motor only on 4(high). I checked the plug going into blower motor and it looks dry and clean. is there a common occurrence with this? What to look for?
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So my AC only works on 4 (no 1, 2, 3). I replaced the resistor as is often the culprit. NOTHING. Still only works on 4. So I unplugged the resistor all together, still only works on 4. So, either my new replacement resistor is also bad (unlikely), or it's the blower motor.
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2001 f350 blower motor for (A/C - Heater) works sometimes and sometimes does not.
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blower motor was intermittent on my 08 prius, now only works when i spin it. Looking for a pdf or instructions on replacing it myself?
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My 2006 F150 was purchased by me in early 2009 with about 28,000 miles on it. It's an XLT crew cab 4X4 with the 5.4. Stock except for a leveling kit and an aftermarket head unit. It currently has about 59,000 miles and has been babied since I purchased it. About 3 years ago I started noting some issues:
A. Oil pressure dummy gauge is all over the place. Some times it will show no oil pressure. Other times it is all the way to the highest mark. Other times the needle has gone 180 degrees past where normal is and is actualy pointing straight down towards the floor.
B. Recently my alternator dummy gauge has started doing the same thing as my oil pressure gauge.
C. The backlight behind my odometer works intermittently, but mostly not at all.
D. My dome light will flicker when first turned on. It doesn't matter which door is opened or if the override switch it turned on. It takes several seconds to come on and will flicker like there is a poor connection somewhere, but stays on once its on.
E. Blower fan will occasionally stop blowing. Once the climate control switch is turned to off, then back to on it resumes working. This doesn't happen often, but does occasionally.
Fortunately, the truck has not left me stranded and I want to keep it that way. We are getting ready to sale my wife's Toyota and this will become her daily driver. I want to take care of any issues before she starts driving it. Are these all separate issues or is there one common issue which could be causing them all?
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My Blower motor is intermittently going on and off. After messing with it for a while it seems to stay on. Motor may be going out. Not real easy to change the blower motor on this 2008. Haynes manual says to take the 2008 and up trucks to the dealer.
2008 F250 4DR 5.4L
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So either these trucks have a super small window wash reservoir or there is something wrong with my truck. The window washer works just fine and then stops. The washer motor is still working but nothing coming out. I fill it up to the top again and suddenly it works just fine. The thing is that when I fill it up it only takes between 1 and 2 quarts of water. I'd imagine the recover probably holds close to a gallon so not sure why mine quits working and then is full after 1 to 2 quarts of water is added. Perhaps the pickup tube in mine is bent or something? No light or message on the dash...it just stops.
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Co-Worker's '03 Jetta TDI
Blower works intermittently. Sometimes all speeds will work. Sometimes only on high. Sometimes on all speeds but at a slower speed than normal. Sometimes it doesn't work on any speed.
Switch doesn't bind, blower motor doesn't make any unusual noises and I don't think it is the blower resistor. He did notice a strange odor coming from the vents the other day and, it appears that the foam on the blend door is starting to disintegrate.
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I am trying some troubleshooting based on various things I found for my 2010 Toyota Highlander blower motor. The issue is that my blower motor operates intermittently. Here are the symptoms and what I've done so far:
-Sometimes it works and sometimes it doesn't. It seems to be dependent on weather (in the sun for awhile and doesn't seem to like that), although lately it doesn't really seem to matter. Had it in my garage yesterday and it just works some times and not other.
-If it works, all speeds work (full range). That makes me think it doesn't have to do with the resistors, although I can't find the electrical schematics for the car.
-All fuses are fine
-I have jiggled all wires and can never get it to work (if not working at the time) or to not work (if working at the time), so I don't think loose wires are the issue.
-I put a multimeter across the leads going to the motor and always get voltage. When the car is on, it's about 13-14V, and when it's not running just above 12V.
-The rear blower motor works perfectly, 100% of the time
-Light physical agitation of the motor doesn't make it come on or go off
My main question is what is the 3rd lead going to the motor? The two bigger leads are the voltage, but that seems to always be there, even with the car off. I'm guessing the 3rd lead is some control signal for the motor but not sure. I can't ever get a voltage on that lead, but I'm not sure I'm even supposed to. When the motor was supposed to be on and it was working, I unplugged it and checked the voltages, but got the same readings as when it wasn't working.
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Recently bought a 2003 E350. The front heater/ac blower motor isn't working. I found the control switch melted and bought a new switch. Before installing it, I need to do some diagnostics. I checked the blower with a couple of jumpers ant it turns and blows. I think that leaves the blower motor resistor. Where it is on a 2003 E350? I also need to check the relay. I have a power distribution box at the front left under the hood. Is the relay there? The box is not labeled like my GM products. Which is the blower motor relay? Finally, which fuse controls the blower motor? I read it might be a 40 amp fuse. If so, that might narrow it down.
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My 1997 XLT 4.0 AWD w/Rear A/C has been having a Blower Motor issue for many months. Occasionally the front blower does not blow. Banging on the Blower Motor, either from under the hood, or even from inside the van underneath the glove box, will start it up again. Once running, it continued running okay until at least the next shutdown. This has gone on throughout the summer. Sometimes a good bump in the road would start it.
Now that the winter is here, heat and defrost are more critical, so it has become a bigger problem. Furthermore, is is now almost constant, where it rarely works without a bang. So it is time to actually fix it now.
From other posts, I think it is either the Blower Motor itself, or the Control Module / Resistor. But since the control module is not located on the motor itself, where I bang, it is probably the motor. Question:
1 - What is the problem, and can I fix it with grease (elbow or actual) etc... or is replacement the proper option?
2 - Should I replace the wheel too, which is not available on RockAuto - but is on the junkyard options on eBay. Unfortunately those are often just as broken as mine. Generic Wheels are available in Auto Zone.
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I own a 99 Suburban 1500 5.7. The front blower motor stopped working on all speeds so I replaced the resistor, it still did not work. I then replaced the speed selector switch and it started working fine. Three days later I smelled a slight electrical burning smell and the fan stopped working again. I plan on replacing the switch again to see if that is what went bad. Whats causing this to happen? Maybe the motor is going bad and causing the switch to short?
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My 1988 Mustang 5.0 GT has stalled out once last year and again recently. Same situation. I drove it for 300 miles with stops about every hour and a half. Pushed to to 90 MPH at times. Ran fine other times on the road for more than two hours. But all of a sudden the engine dies. Electrical all works but won't turn over. If I sit in it for about 10 minutes, it will start and run for the next 5 to 10 minutes than a cough or two and pull over. I have had new plugs put in and also replaced the whole distributor. Ford mechanics have stared at it and scratched their heads and say it is running fine when they hand it back to me.
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I have a 1988 full size Ford Bronco that when I start it the motor keeps turning over even when I turn the key off. I installed a new solenoid thinking that would do the trick and it worked correctly the first time, but the second time it kept turning over until I unhooked the battery. What is the problem? Is it the ignition key?
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I have a 1996 Ranger that the Heater/AC blower only works when the outside air temp is above 45 degrees. I have replaced the relay, and the blower motor resistor. What could be causing this?
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Won't switch between functions (heat, vent, etc.) ...
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Okay, I have checked the clutch issue and I have read the sticky damper door thread but, non of these seem to fit my problem? The a/c blows cold when it has a mind too but, in a mere few seconds it will blow like you turned the temp control to boil. go a little while then the a/c blows ice cold again. The compressor never misses a beat on the the back and forth.
I am headed out with the family for a 1500 mile trip in two weeks and a/c would keep the masses happy!
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