Sorry for your troubles! First off...never EVER go back to that mechanic. Secondly, the temp light may have been flashing because he may not have flushed the coolant lines properly and there may be a bubble in the coolant system. Meaning that once that bubble surfaces, it'll flush the coolant through the system and you may actually be low on coolant. Also, if they replaced the coolant flange it is HIGHLY recommended to replace the sensor as well. And it's possible that if the sensor is bad it could be causing a whole mess of lights and issues as well. And his excuse to "make the car hot to fix it" is complete BS! Yes the car needs to get to operating temperature to make sure you get all the bubbles out of the coolant system but to be 'hot' is not a good thing. Blowing cold air usually means the heater core...considering your coolant system recently went through a "fix" could have something to do with it. Especially if they did it wrong. Please check and make sure you're coolant is PINK. Not green, purple, blue whatever...but PINK. After working at the dealership, I found out the reason why VW's use the specific PINK coolant is because their engines run hotter than most. And in doing so, the coolant that works for most cars cannot withstand the heat that the VW engines make. So they designed a specific fluid that would work well with the heat. Is this true? I don't really know, that's just what they tell me at work.
If you can, call your local dealer and ask what they charge to do an inspection on the car. Explain your situation. Then you can get the REAL info as to what happened and maybe demand your money back from the so called "mechanic" who "fixed" your car.
Let us know what the dealer says and we may be able to help you as to what to actually fix and what to skip. The dealer will of course tell you EVERYTHING that's wrong, but it doesn't mean you have to do it all.
Hope that helps and hope you can get Daisy back to her old self again. I know what it's like to have a sick bug. I just recently had a sick one myself.
If you can, call your local dealer and ask what they charge to do an inspection on the car. Explain your situation. Then you can get the REAL info as to what happened and maybe demand your money back from the so called "mechanic" who "fixed" your car.
Let us know what the dealer says and we may be able to help you as to what to actually fix and what to skip. The dealer will of course tell you EVERYTHING that's wrong, but it doesn't mean you have to do it all.
Hope that helps and hope you can get Daisy back to her old self again. I know what it's like to have a sick bug. I just recently had a sick one myself.