Member Since: 09 Dec 2021
Location: Suceava
Posts: 8
Cold air in vents but warm with FBH on
Hi there,
I experience the following problem on my Discovery 3 2.7 tdv6 2006:
With the engine warm (driving for 45 min) the inside air coming from the vents is cold. If I start the FBH (auxiliary heater - I have the remote control installed so it is no linger controlled by the car) the air comes hot right away. If I stop the FBH the air gets cold again.
I am thinking that most probably the water pump from the FBH is doing the circulation to the heater and that's why the air is getting warm.
The question is: what could go wrong and why the water is not circulating anymore to the inside heater? Could it be the water pump? Like I said, I drive for more than 45 min and the water temperature on the engine remained on the normal level (@90). Is there another pump for circulating the water to the heater? or a valve or something?
Thanks in advance!
Ionut
21st Nov 2022 11:11 am
Balu1989
Member Since: 17 Feb 2023
Location: Benešov
Posts: 1
hi, I have the same problem on my D4 2O12, any solution for this issue?
thanx a lot
Jan
8th Apr 2023 8:26 pm
Lrstaylor
Member Since: 04 Oct 2018
Location: Kent
Posts: 594
Sounds like the normal blocked heater core problem a flush of the heater core should sort it.
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