Heating Issue
 

As of late my BMW has gone from a blazing furnace of a heater to mildly warm. I have also noticed that even after having run for over an hour, the temperature gauge is still staying in the high end of the blue on the gauge. Obviously the vehicle is running cold. Any ideas what would be causing this, and perhaps what would fix it?

Could be the thermostat stuck open. Is it cold where you are?

dooh! must be since you re trying to use the heater. Silly me.

yeah this is most likely the problem, replacement is very straight forward, let us know if you need any help, you should be able to pick up a new one for around $10

cavalry13 what kind of tempurater do you call cold in degrease centergrade?

Definitely sounds like it is time to replace your thermostat. This is tough to do with the fan in place. You can make the tool to hold the fan pulley while you loosen the fan if you have a drill and a grinder. Just find a picture of one on line and you will see how to make it.

Don't forget that the big nut that holds on the fan is left-handed thread!

If your car still has a black plastic thermostat cover, don't try to re-use it. They shrink and warp with time so you cannot re-use them. Either get a new plastic one or get an aluminum thermostat cover.