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95 Volvo 850 blower motor will not come on

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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toddrl72
Posts: 6
Joined: Wed Oct 16, 2019 8:59 am
Year and Model: 1995 850 Turbo
Location: Maine

95 Volvo 850 blower motor will not come on

Post by toddrl72 »

Cannot get blower motor to work on an 850 turbo I pulled the blower and it works when hooked direct to battery power
I'm getting a 124 and a 418 code from the ECC can someone help with this?
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RickHaleParker
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Re: 95 Volvo 850 blower motor will not come on

Post by RickHaleParker »

1-2-4 Driver’s side interior temperature sensor open circuit or shorted to 12 volts.
4-1-8 No control signal to blower fan power stage.
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2019-10-16.png
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
toddrl72
Posts: 6
Joined: Wed Oct 16, 2019 8:59 am
Year and Model: 1995 850 Turbo
Location: Maine

Re: 95 Volvo 850 blower motor will not come on

Post by toddrl72 »

So what does the no signal to power stage mean? No signal to the blower resistor or no signal to the blower motor?
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RickHaleParker
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Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
Has thanked: 3 times
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Re: 95 Volvo 850 blower motor will not come on

Post by RickHaleParker »

The 1995 850 has Power stage (Power Transistor) between the blower motor not a Resistor Pack.
The Power stage is what you are incorrectly calling the blower resistor.

Look for shorts, opens in the loom between the ECC and the Power Stage. It could be the Power Stage but check the wiring first. There is a remote chance it is a defect in the ECC, considering the age of the car don't discount the ECC but check the other two things first.
95_850_ECC.png
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
toddrl72
Posts: 6
Joined: Wed Oct 16, 2019 8:59 am
Year and Model: 1995 850 Turbo
Location: Maine

Re: 95 Volvo 850 blower motor will not come on

Post by toddrl72 »

Does anyone happen to know where the cabin temp sensors are located. It says in headiner above drivers and passenger seat. Is that correct. I got power to the blower motor but not getting a ground connection.
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RickHaleParker
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Year and Model: See Signature below.
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Re: 95 Volvo 850 blower motor will not come on

Post by RickHaleParker »

The Power Stage grounds the blower motor.

Look under the grab handles above the doors.
Last edited by RickHaleParker on Fri Oct 18, 2019 6:22 pm, edited 1 time in total.
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
toddrl72
Posts: 6
Joined: Wed Oct 16, 2019 8:59 am
Year and Model: 1995 850 Turbo
Location: Maine

Re: 95 Volvo 850 blower motor will not come on

Post by toddrl72 »

Ok I get it. The sensor is in the headliner. How do I get the headliner down?
toddrl72
Posts: 6
Joined: Wed Oct 16, 2019 8:59 am
Year and Model: 1995 850 Turbo
Location: Maine

Re: 95 Volvo 850 blower motor will not come on

Post by toddrl72 »

The power stage was bad. Thank you so much for your help with this.
User avatar
RickHaleParker
Posts: 4968
Joined: Mon May 25, 2015 2:30 pm
Year and Model: See Signature below.
Location: Kansas
Has thanked: 3 times
Been thanked: 631 times

Re: 95 Volvo 850 blower motor will not come on

Post by RickHaleParker »

toddrl72 wrote: Sun Oct 20, 2019 9:46 pm The power stage was bad. Thank you so much for your help with this.
Did that clear ECC-124 also?
1998 C70, B5234T3, 16T, AW50-42, Bosch Motronic 4.4, Special Edition package.
2003 S40, B4204T3, 14T twin scroll AW55-50/51SN, Siemens EMS 2000.
2004 S60R, B8444S TF80 AWD.
2005 XC90 T6 Executive, B6294T, 4T65 AWD, Bosch Motronic 7.0.
toddrl72
Posts: 6
Joined: Wed Oct 16, 2019 8:59 am
Year and Model: 1995 850 Turbo
Location: Maine

Re: 95 Volvo 850 blower motor will not come on

Post by toddrl72 »

No that code still remains.
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