Heater turning itself up

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Itsteagle
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Joined: Sun Dec 18, 2016 7:51 pm

Heater turning itself up

Post by Itsteagle » Mon Apr 09, 2018 1:34 am

Had a search for this but didn't manage to fine anything, I might just be worrying about nothing but it's always nice to get a second opinion!

Replaced the thermostat and waterpump on my 130 recently and I've noticed that on spirited drives the drivers side heater will turn itself right the way up to max, it's not on auto or anything like that, and I'm pretty certain I don't have any air in the system either.

I thought that it might just be a way of telling the driver to ease off a little as the engine is getting warm, however it did it tonight with an ambient temp of only around 5 degrees centigrade. Plus thinking about it now the fan speed stayed the same (only 1 bar) and the additional cooling from having the heater on max must be negligible.

Never noticed it before i did the pump and stat but now noticed it twice within a month. Help? :lol:
2005 130i

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