Applying the handbrake increases heater power

Blizzard44 · Oct 19, 2019

Hi all, bit of a strange one for you. Today I noticed that when I apply the handbrake there is a noticable increase in the heater output. Its a 300tdi defender. The left side heater lever is as far down as I can get it and does do a nice job of heating up the inside, but I was wondering why the blower output increases when I apply the handbrake and then decreases when I release it? Some sort of earth fault?
Thanks

neilly · Oct 19, 2019

Blizzard44 said:
Hi all, bit of a strange one for you. Today I noticed that when I apply the handbrake there is a noticable increase in the heater output. Its a 300tdi defender. The left side heater lever is as far down as I can get it and does do a nice job of heating up the inside, but I was wondering why the blower output increases when I apply the handbrake and then decreases when I release it? Some sort of earth fault?
Thanks

Would be my thoughts, try using a jumper cable as an earth and see if it affects things. Obvioulsy not while you are driving..LOL.

Cheers

lightning · Oct 19, 2019

If the heater output increases because the blower speeds up, the handbrake cable must be providing an Earth as suggested already.

wireman · Oct 20, 2019

I agree with the above, you have a bad earth from the gearbox to the chassis, buy an earth strap, clean the area up and attach.

Sofasurfer · Oct 20, 2019

My temperature guage goes up slighty when I switch the lights on. Defender 90 1997 tdi300. Similar problem / solution?

neilly · Oct 20, 2019

Sofasurfer said:
My temperature guage goes up slighty when I switch the lights on. Defender 90 1997 tdi300. Similar problem / solution?

Yep, when I got mine, I gave myself a fright first time I drove it at night, temp gauge hit the red. A few well placed and earthed leads made it all OK.

Cheers

Applying the handbrake increases heater power

Blizzard44

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neilly

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lightning

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wireman

Well-Known Member

Sofasurfer

Well-Known Member

neilly

Well-Known Member

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