VW Passat TDI heater issue

[glennjamin]

Had cambelt and water pump changed on Passat a month ago. Now the heater isn't getting very hot even on 30 mile trip. Temp gauge stays where normally is mid of gauge. No loss of water ,the water level hasn't changed. A bit puzzled any ideas ?

[Krikkit]

Bleed the cooling system, not done properly when the water pump was changed.

[wpa1975]

Sounds like an air lock in the system

[Demelitia]

It’ll need the heater core bleeding properly, sometimes they can be a pain, requiring a few little tricks depending on which particular car.

What year/engine is the car?

[glennjamin]

Hi it's a 2008 Passat TDI Sport. Thank you in advance...

[E-bmw]

As above, the chimp that did the job didn't bleed the system after doing the job.

[glennjamin]

Thank you for your replys so far ..Re bleeding the system is it easy to do or is it a return to garage job ? First time that I've had to return to this garage

[E-bmw]

Personally, I would take it back to them, tell them the issue & what has caused it, insist they do the job properly for the quoted price & then never go there again.