If a 2001 VW Beetle does not have hot air coming from the heater there is a problem with the vehicles heating system. The heater core is malfunctioning and will need to be replaced.
About 90 dollars if you do it yourself.
Check your heater core also.
Remove the water supply hoses from your heater core. Remove the heater core retaining bolts. Reverse the process to install your new heater core.
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haven't seen a block heater on VW's
You can find the 1985 VW heater core behind the drivers side kick plate. You will need to remove the kick plate in order to access the heater core.
You cannot, they are not manufactured with a block heater.
You can install a circulating block heater in your 2001 VW Beetle on the bottom radiator hose. The installation is quite simple.
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yes.
There is not a heater valve in a WV Passat. Instead, coolant moves through the heater core at all times.