Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Blower working intermittently

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Old 02-13-2011, 12:59 PM
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Default Blower working intermittently

Hey Guys,

The blower on both my and my friends 95 and 96 wagons are starting to act funny. Sometimes the switch just doesn't do anything ( aka turn the blower on ) and then it just starts up again like normal the next day. Is this a common switch failure or is there a wiring issue? I know for certain on my 96 that the motor is good, cause I replaced it a few months ago. Any ideas?

My guess is the switch

- Grae
 
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Old 02-14-2011, 09:43 PM
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...........maybe this is new, no one ever experienced this?
 
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Old 02-15-2011, 08:13 AM
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Are you climate control or manual?
 
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Old 02-16-2011, 01:42 AM
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You may need a new resistor assembly (power stage). If not, the unit itself may be shot. Check for secure electrical connections.

ECC (Automatic) unit will give you stored fault signals by blinking the LEDs on the face panel of the ECC. Clear stored fault codes (if any) and see if it cures the trouble.

See attached; if your A/C is different, then you have ECC. The 3rd pic belongs to a member (cannot remember his name).


JPN
 
Attached Thumbnails Blower  working intermittently-850-mcc-1-.jpg   Blower  working intermittently-850-acc-pwr-stage.jpg   Blower  working intermittently-asppg_wq119346451.jpg  
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Old 02-16-2011, 01:42 PM
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Ill post a pic of my unit tonight, but i thing its different than your first pic, Mine has "Auto" settings... ( climate control? )

Would the Resistor, or the unit being bad be an intermittent problem? This only happens every once in a while for me...
 
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Old 02-17-2011, 03:04 AM
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If the ECC itself is shot, it could give you all kinds of troubles. If it is the case, I would try to find one at a junk yard. However, you may only need to buy a can of electrical contact cleaner and clean every connections among the ECC, blower and the resistor.


JPN
 
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