A/C not working properlt

SLASHHOLT23

MEMBER
2007 VOLVO S60
2.0L
4 CYL
2WD
AUTOMATIC
187,000 MILES

For starters the fan blows air when it wants to. When it does blow air, only the passenger side blows out cold. The driver side blows depending on the climate outside. But the fan seems to only work when it’s cool outside, not in hot weather. I am talking about the blower fan for the air conditioning not the radiator fan. I can hear the refrigerant moving through the lines. There is no Volvo dealership in my city in Texas unfortunately. Any tips where I can start fixing this problem?

1 Reply

JIS001

MECHANIC
3,411 POSTS

For starters the blower motor transistor would need to be replaced to address the fan coming on when it feels like. Will post instructions and images below. As for one side cold and one side warm, you would need an advance scan tool to communicate with the climate control module and do a simple calibration of the damper motors to start with. Here are the instructions for the transistor.

07 Volvo S60 2.5T L5-2.5L Turbo VIN 59 B5254T2
Blower Fan Motor/Power Unit (Blower Motor Resistor), Replacing
Vehicle Heating and Air Conditioning Blower Motor Resistor Service and Repair Removal and Replacement Blower Fan Motor/Power Unit (Blower Motor Resistor), Replacing
BLOWER FAN MOTOR/POWER UNIT (BLOWER MOTOR RESISTOR), REPLACING
Blower Fan Motor / Power Unit (Blower Motor Resistor), Replacing

Fan motor

Removal

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Remove:
- the sill trim panel. See Front door sill trim panel See: Scuff Plate > Removal and Replacement > Front Sill Trim Panel
- the soundproofing panel. See Soundproofing panel, replacing See: Dashboard / Instrument Panel > Removal and Replacement > Soundproofing Panel, Replacing
- side panel on the center console. See Center console, replacing See: Console > Removal and Replacement > Center Console, Replacing
- the glove compartment. See Glove compartment, replacing, B5244T5, B5254T2 See: Glove Compartment > Removal and Replacement > Glove Compartment, Replacing
- any mounting hooks for child seats
- detach the drain hoses from the engine and the filter housing. Move the drain hoses to one side
- detach the floor carpet at the front. Fold the carpet back.

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Engine

Remove:
- disconnect the connector
- the 5 screws for the blower fan motor
- detach and remove the blower fan motor.

Engine

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Remove:
- the connector
- detach the cover from the motor
- the 2 screws on top
- press and pull out the motor and fan hub. Use a screwdriver for example.

Installation
Install in reverse order.

Power unit

Removal

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Remove:
- the blower fan motor with the fan hub as above, see Fan motor

Remove:
- the power unit, 2 screws.

Installation
Install in reverse order.

Wish I had a way to calibrate the damper motors without the scan tool. A good I dependent shop should have the equipment t for that. By doing the calibration you will know if that was the issue or something else like a bad damper motor or climate box. I do not suspect low refrigerant since if it was low it would be warm on passenger side and cold on drivers side.

Hope the information is helpful and keep us updated as well please.

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