Polo 6r heater fault - cold air only
Posted: Mon Sep 18, 2017 11:49 pm
Please could I get some help with the following fault/issue with my Polo...
'61' 2011 (2012MY) Polo 6r 5 door MATCH. 1.4 petrol with 7 speed DSG. Climatronic (manual) A/C controls.
As the wether has started to get colder, I have found the interior heater only blows cold air, no matter what the temperature setting. The fan works on all 4 speed settings and the A/C + Recirculation controls work just fine. The blower direction (windscreen, feet only etc.) also does not work, as no matter which direction the airflow is set to, air is blown out the vents. The unit illuminates correctly when headlights are used. I have run a full VCDS on the car and zero faults come up with the HVAC.
BACKGROUND:
In the last 6 weeks I have replaced the RCD310 with a genuine RNS510 (LED type) and 9W7 bluetooth module. Prior to collecting the vehicle it had its timing belt and water pump (with coolant) changed.
SYMPTOMS:
As the vehicle was bought in May of this year, with the warm weather, I cannot recall testing to see if the heater actually worked. I do know the A/C works just fine. I can also recall, on an odd occasions, when turning the temperature knob, it was very stiff to turn. It kind of went to the 10-past the hour setting but wouldn't move further. Moving it back and then round again did not resolve the issue. Then on other times, it would rotate round just fine. When it was stuck I did force it a little and it would 'click' and then rotate round.
CONCERN:
When I installed the RNS510 I am pretty sure I did not disturb the heater controls. I have Google'd the module and see that it is an electrical connection on the rear (no push/pull rods). This says to me that these controls are electronic. Ergo, if there is a fault, I would expect VCDS to pick it up? But the odd thing is, VCDS is reporting zero faults with the HVAC system.
As the car was bought as an AUC from VW (Das Welt) I have booked it in to mu local Dealer for early October. However I am concerned:
* they might notice vehicle is modified from original spec. and claim Warranty is now void - Ill cross that bridge should I come it.
* could I have knocked the heater control unit somehow?
* it may be an airlock in the system as, when the coolant was changed, it wasn't bled properly? Engine appears to heat up just fine as the engine fan will kick in every so often.
* unit itself is faulty and needs replacing. If warranty won't cover it, then I'll buy a unit from the forum, is it P+P?
Any thoughts and a advice greatly appreciated!
'61' 2011 (2012MY) Polo 6r 5 door MATCH. 1.4 petrol with 7 speed DSG. Climatronic (manual) A/C controls.
As the wether has started to get colder, I have found the interior heater only blows cold air, no matter what the temperature setting. The fan works on all 4 speed settings and the A/C + Recirculation controls work just fine. The blower direction (windscreen, feet only etc.) also does not work, as no matter which direction the airflow is set to, air is blown out the vents. The unit illuminates correctly when headlights are used. I have run a full VCDS on the car and zero faults come up with the HVAC.
BACKGROUND:
In the last 6 weeks I have replaced the RCD310 with a genuine RNS510 (LED type) and 9W7 bluetooth module. Prior to collecting the vehicle it had its timing belt and water pump (with coolant) changed.
SYMPTOMS:
As the vehicle was bought in May of this year, with the warm weather, I cannot recall testing to see if the heater actually worked. I do know the A/C works just fine. I can also recall, on an odd occasions, when turning the temperature knob, it was very stiff to turn. It kind of went to the 10-past the hour setting but wouldn't move further. Moving it back and then round again did not resolve the issue. Then on other times, it would rotate round just fine. When it was stuck I did force it a little and it would 'click' and then rotate round.
CONCERN:
When I installed the RNS510 I am pretty sure I did not disturb the heater controls. I have Google'd the module and see that it is an electrical connection on the rear (no push/pull rods). This says to me that these controls are electronic. Ergo, if there is a fault, I would expect VCDS to pick it up? But the odd thing is, VCDS is reporting zero faults with the HVAC system.
As the car was bought as an AUC from VW (Das Welt) I have booked it in to mu local Dealer for early October. However I am concerned:
* they might notice vehicle is modified from original spec. and claim Warranty is now void - Ill cross that bridge should I come it.
* could I have knocked the heater control unit somehow?
* it may be an airlock in the system as, when the coolant was changed, it wasn't bled properly? Engine appears to heat up just fine as the engine fan will kick in every so often.
* unit itself is faulty and needs replacing. If warranty won't cover it, then I'll buy a unit from the forum, is it P+P?
Any thoughts and a advice greatly appreciated!