Question about 2001 Volvo S80

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What is the location of power stage/transistor unit on the blower fan on 2001 volvo s80

Fan runs with no control while driving and continues after the vehicle is shut off!

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Claude Kayser

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Volvo Forum • 2000 v70 Blower Motor/Resistor Question - Matthews ...

www.matthewsvolvosite.com/forums/viewtopic.php?p=166169
Jan 8, 2011 - 14 posts - ‎1 author I replaced my blower motor and resistor - with the help and ... On ECC the transistor power stage (referred to as resistor) will shut off blower if the ... the current to blower(voltage level to blower) is controlled by the ECC control unit. ... Hook the negative side of the car battery (or other 12 V source) to the fan. Volvo Forum • S40 fan speed erratic
10 posts
Jul 18, 2013
Volvo Forum • Wanting create a repair procedure for ...
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All how to replace blower motor in volvo s70 v70 c70 XC70 ...

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www.youtube.com/watch?v=frZl49p2quk
Sep 5, 2007 - Uploaded by volvoproject All how to replace blower motor in volvo s70 v70 c70 XC70 ....Awesome video....took 15 mins to install blower motor andresistor on my .... Most time was spent trying to remove theelectrical wires from around the blower properly (there ... I was suprised how much bigger the fan is irl than it looked in this vid!

Posted on Oct 07, 2015

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1 Answer

My 2001 v70 shows hot engine light on col startup. Where is the sending unit on this car? or what else might it be? thanks


Very likely is the sending unit, as you suggest. There are usually separate units for the temperature gauge and the fan switch though. Check YouTube for some videos, e.g.
http://www.youtube.com/watch?v=e3bASQM4EYs: How To Diagnose Replace Volvo Engine Coolant Temperature ETC Sensor V70 S60 S80
http://www.youtube.com/watch?v=gcJofnHEULc: How To Replace Volvo ETC Sensor

Sep 08, 2014 | Cars & Trucks

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Fan blower not blowing


Most likely need a new blower motor resistor

Aug 04, 2014 | 2001 BMW 325Ci

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I have a Volvo 2004 S80 whose blower fan motor stays on, even after the ignition switch has been turned off. What gives? Is this a normal function or should it go off like everything else when you shut it...


Not True. I have a 2004 S60 and a std features is that the blower motor will run from 10 minutes to an hour after the engine has been turned off, This is to dry the evaporator in the dash and avoid musty odors.

If it drains your battery dead there are possible issues; 1) a weak battery that needs replacing or 2) a faulty power stage/transistor unit ont he blower fan.

The transistor unit has power and ground and a digital signal from the control unit. When the transistor sticks, the the blower will not stop when the ignition is turned off.

Apr 23, 2011 | 2004 Volvo S80

1 Answer

1999 Volvo S80 T6, Starts blower on its own.


If you are talking about the thermo electric cooling fan, its operation is independent of the car's electical system. It is switched on and off by the engine temperature. When you park, the engine heat soaks upward to heat the thermostat turning the fan on. It will run until the engine cools down and the thermostat switches it off.

Apr 08, 2010 | 1999 Volvo S80

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I have 2001 Volvo S80 and the heater and AC comes on for a minute or two and then shuts off. The dealer said it was the blower mower burned out. How can that be if it works now and then?


Assuming that the dealer is correct and isolated the problem down to the blow motor...
it IS possible for the motor to work intermittently due to heat buildup. Malfunctions due to heat will call the motor to run fine for a bit, and then quit when the motor reaches a high enough temperature to cause a malfunction. It would then quit working until it cooled back down, and repeat the process.

Whether is it just dead, or it is intermittently dead, for all intensive purposes, the motor is no longer usable and needs to be replaced with a new unit.

Nov 06, 2009 | 2001 Volvo V70

1 Answer

2000 Volvo V70 climate control problem - blower remains in high, regardless of AUT 0-High setting. Vent selection and temperature controls work. Any idea?


Most common cause of this problem is a bad climate control power stage. The power stage control the speed of the blower fan on different settings, if it goes bad it defaults to full blast. There is a small chance the climate contro lunit itself is bad but more than 90% of the time, it is the power stage. It is located near the blower fan under the dash in the passenger footwell area. It makes it much easier to remove the glove box and knee bolster as well as the cover panel. It is rectangular in shape about 1.5" x 3" and black.

Nov 01, 2009 | 1999 Volvo V70

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Heater blower not working


The blower is not the problem
The problem is a faulty final stage resitor located
on the passenger side under the dash.
Very common - easy to replace.

May 28, 2009 | 2001 BMW 325

2 Answers

No air or heat blowing from vents


if the fan is blowing this could be a problem with the climate controll switch that changes the direction of air from floor to defrost to vents, some are vacuum controlled through a vacuum operated mechanism that opens and closes a door in the vents which redirects the air to different places.

Mar 24, 2009 | 1999 Volvo S80

1 Answer

1993 volvo 850 heater blower works sometime tell me why?


These models had problems with the blower motor power stage, which is what controls the fan speed, and the blower motors wear out. There a good chance it needs both!

Dec 29, 2008 | 1993 Volvo 850

1 Answer

Heat and Vent fan in Volvo S80


fan motor and powerstage

May 16, 2008 | 1999 Volvo S80

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