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Thread: V70R Heater

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    V70R Heater

    hi all,

    my heater blows warm, not hot, to the windscreen.
    If I change it to blow at the floor, or anywhere really, it only blows cold air.
    I can hear everything moving and the air changes direction as it should, just no heat.

    Any ideas welcome, its cold outside and I want to be warm inside.
    May the boost be with you.

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    ...here we go again...
    LeeT5's Avatar
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    (Might help if we knew what vehicle it is?)

    Firstly check your coolant level in the expansion bottle is above minimum when cold but not above Maximum.

    You're going to need an infrared thermo probe for the next bit as checking hoses with your hands is firstly unprofessional and secondly, not accurate, not to mention the risk of scalding yourself if something is/goes wrong!

    Once the engine is up to temperature, Radiator fans kicking in/out as normal, A/C switched off, cabin air temp set to max but have the blower on medium and out the front vents.

    With the thermoprobe; check the temperature on both the top and bottom hose on the Rad. It needs to be about 15*C cooler on whichever hose (depending on flow into the Rad) but essentially, the temperature will be circa 80-90*C.
    If that's ok, then move on to the Heater matrix hoses on the bulkhead. You should have roughly the same temps as the Rad hoses but more importantly, you need to have about 10*C difference in temperature between the two hoses. Try to measure on the rubber hose, not any metal clips or plastic parts.

    If that is OK, then the fault lies with the electronic flap control side of things, inside the dash. That won't be cheap to fix.

    If the heater matrix hoses are massively different, ie, 87*C on one and 57*C on the other, for example, then you have a blocked Heater matrix.

    It would be beneficial if you can check 'live readings' as to what the ECU is reading via the Temp sensor.

    Another thing to check is; does the air coming out the vents get hot or hotter when you increase engine speed? If so, this is a good indication that the water pump is working, however, this should really be checked properly using a pressure gauge.

    If you cannot be 100% on any of the above then you really should get it to a garage, in case you have a cooling issue.

    Sorry but that's the best I can do. Faults surrounding cooling issues and heating really need proper diagnosing in a controlled environment with the correct equipment as a misdiagnosis could lead to engine damage or injury to person.
    Vehicle cooling systems should be treated with the utmost care and not taken for granted.
    I wouldn't want to ill advise you and then you do something or damage your engine. Get it properly checked mate
    Last edited by LeeT5; Friday 24th February 2017 at 19:04.
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

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    Still more fettling needed,
    will it never end?
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    It's a P2 V70R, judging by the fact it's in Phase 2 models, and it says V70R heater.

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    In addition to Lee's comments above:

    If you have access to VIDA, check if there is any CCM related DCT stored. If its error free, then complete the CCM recalibration too.

    Next, clean the passenger compartment air temp sensor with a hoover as sometimes this gets clogged.
    Make sure you're not going to touch or break the copper wire behind the went as then the CCM unit won't work anymore.

    If you're handy enough, take out the CCM as you'd be able to get better access to the fan behind which should also rotate freely.


    Does your car have the latest software update from Volvo? There is one available for the CCM module.
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    Last edited by htomi; Friday 24th February 2017 at 20:05.


    SOLD - 2004 Volvo V70R GT/Titanium Gray/Gobi - 103000 Miles, Bilstein B6 Front, Resonator delete, do88 Intake, do88 Lower Intercooler pipe, Forge CBV with green spring, Grey Pierburg TCV, Viva Strut Bar Conversion Kit, 17'Pegasus, 235/45/17 Goodyear Eagle F1 AS3

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    Quote Originally Posted by stribo View Post
    It's a P2 V70R, judging by the fact it's in Phase 2 models, and it says V70R heater.
    Point taken
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

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    Quote Originally Posted by htomi View Post
    In addition to Lee's comments above:

    If you have access to VIDA, check if there is any CCM related DCT stored. If its error free, then complete the CCM recalibration too.

    Next, clean the passenger compartment air temp sensor with a hoover as sometimes this gets clogged.
    Make sure you're not going to touch or break the copper wire behind the went as then the CCM unit won't work anymore.

    If you're handy enough, take out the CCM as you'd be able to get better access to the fan behind which should also rotate freely.


    Does your car have the latest software update from Volvo? There is one available for the CCM module.
    You can use an Air duster spray into the tiny grille. This will blow the dust off the fan first. Then use a contact cleaner spray to clean any dirt off the sensor. Make sure you spray air duster first then contact cleaner (not the other way round).
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

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    When I got my car it was clogged.
    I took out the CCM module, then carefully disassembled it.
    Cleaned the fan + tube first and then used Photographic Solutions Eclipse (liquid cleaning solution to remove dust/dirt from a digital camera sensor) and a sensor swab to clean the copper wire. Took me aprox 45-50 mins from start to finish.
    Obviously the compressed air/ air duster + contact spray should do the job too.


    SOLD - 2004 Volvo V70R GT/Titanium Gray/Gobi - 103000 Miles, Bilstein B6 Front, Resonator delete, do88 Intake, do88 Lower Intercooler pipe, Forge CBV with green spring, Grey Pierburg TCV, Viva Strut Bar Conversion Kit, 17'Pegasus, 235/45/17 Goodyear Eagle F1 AS3

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    Maybe it could bethe evaporator temp sensor


 

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