Hi folks,
I am having an issue with my interior heating for over a year now, hoping to get some input on how possibly to solve this.
Subject: Omega 3.0 Facelift from 2000.
Bought this one almost 4 yrs ago with 50k miles on it. Current milage 105k. At the first winter I've had a Webasto Parking Heater installed which was working like a charm for 2 years/winters.
Last winter my head gaskets were replaced and after that operation the interior temperature could not get nicely warm anymore with outside temps sub zero. With ECC on HI the output air does not reach a very hot temperature. I noticed this occurs after driving on steady speeds (I travel most of the route to work over a 55MPH road). When I speed up a bit making the engine rev a bit more (to about 3.500-4.000rpm) you can feel a temporary flow of much warmer air comming into the interior. Back to cruising speed it cools down again.
Popped off the vacuum from the HBV, didn't help.
ECC is calibrated again with Tech II, temp sensors were reporting correct values when testing indoors (garage). Didn't help. No errror codes from ECC. Also tried a brand new ECC, again completely calibrated and set up right, no luck.
Since then the Thermostat is renewed (OEM) and the Parking Heater is also disconnected as we found out this did make the air temp a bit hotter. As I knew my Heat Exchanger was leaking a bit I planned to replace it this summer. Now that is done (with OEM part) and the first cold days kick in, I still experience the same problem.
Yesterday I was testing with the manual output settings in the ECC. When I set it on top and middle (foot channel off) the air is more warm then when I set top and foot channel (middle off). Left and right are equally warm, central vents blow cold air.
I am now planning to redo the hoses leading from the secondary waterpump (which is now placed higher than originally as at its normal spot now the Parking Heater is located) to the Webasto to the interior. There are several 90degree turns and the total lengt of the hose has been increased due to the parking heater. Could this be of any influence? Would sound strange to me as the system has been functionating fine for 2 years in the same setup.
Any thoughts and input would be appreciated!
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Topic: Interior heating issue (Read 969 times)