webasto whirring still!! - Page 3

Matt1960 · 14th October 2010, 08:10

Quote:

Originally Posted by FrenchMike

Hi,Del

I think there is misunderstanding ,
Your Webasto stay inactive as long as the external temperature is more
than 5 degrees C.
On winter it only help your engine to be hot quicker

Nothing to do with heater/aircon

And i still think your webasto don't work.

Mike

Del
Yes I have to agree,
I suspect the fbh may be faulty, and the test will be when it is very cold.
The fbh was there initially to speed up the very slow heating of the coolant, because of the thermally efficient engine.
This is particularly noticable when the temp is freezing or below.

But yours was working when it shouldnt, and this can sometimes mask a faulty thermostat, as the fbh gets the coolant up to 72c, which shows as normal on the guage.
Your coolant should get to 88-89c with or without the fbh, but may be much slower to do this without.
The diagnostics temp will show whether your thermostat is failing, as Jules has said.

Matt

FrenchMike · 14th October 2010, 08:55

As,already said,

In doubt,one can test the FBH irrespective the external temperature is,
engine stopped ,ignition OFF !

override.jpg

Mike

goldie75 · 23rd October 2010, 20:36

Hello again folks.I've just travelled another 900 odd miles in really cold weather and the temp gauge stayed mainly between 8 and 9 o'clock [occasionaly hitting 9 for a wee while]I realise that it should really be sitting at 9 once fully warm.I'm concerned what damage I am doing the car when the tempo not reaching fully 9'oclock.The car seems to be driving fine.Its due a service[prob on Tues] so will get the thermostat checked then.Thanks again Del

Rammie · 23rd October 2010, 20:57

Hi Del,
If your FBH was working, and with the temps where you live, it should be, you would hear it! It sounds like a Tornado Jet Fighter on takeoff!

Also, if you lift the bonnet, and carefully touch the exhaust pipe, and I mean carefully! cos they get extremely hot, this should give you an idea that it is working, as others have commented, I suspect it's not.

I had similar problems to you where the whirring noise was there even when I opened the bonnet or opened a door. The fault was the PCB. I replaced this and since then it has been working fine and warms the car extremely quickly on cold mornings.
Oh, I did disconnect the KBus lead too from the plug.

Hope this is of some help.

14th October 2010, 08:55	#22
FrenchMike This is my second home Rover 75 Saloon Join Date: Aug 2007 Location: Avignon Posts: 4,466 Thanks: 94 Thanked 661 Times in 554 Posts	As,already said, In doubt,one can test the FBH irrespective the external temperature is, engine stopped ,ignition OFF ! override.jpg Mike Last edited by FrenchMike; 24th October 2010 at 13:04..

23rd October 2010, 20:57	#24
Rammie Gets stuck in Rover 75 Club CDT Tourer Join Date: Feb 2008 Location: Derby Posts: 686 Thanks: 0 Thanked 0 Times in 0 Posts	Hi Del, If your FBH was working, and with the temps where you live, it should be, you would hear it! It sounds like a Tornado Jet Fighter on takeoff! Also, if you lift the bonnet, and carefully touch the exhaust pipe, and I mean carefully! cos they get extremely hot, this should give you an idea that it is working, as others have commented, I suspect it's not. I had similar problems to you where the whirring noise was there even when I opened the bonnet or opened a door. The fault was the PCB. I replaced this and since then it has been working fine and warms the car extremely quickly on cold mornings. Oh, I did disconnect the KBus lead too from the plug. Hope this is of some help. __________________ [SIGPIC][/SIGPIC]

23rd October 2010, 20:36	#23
goldie75 Regular poster 2005 cdti classic tourer Join Date: May 2009 Location: south ayrshire Posts: 65 Thanks: 4 Thanked 0 Times in 0 Posts	Hello again folks.I've just travelled another 900 odd miles in really cold weather and the temp gauge stayed mainly between 8 and 9 o'clock [occasionaly hitting 9 for a wee while]I realise that it should really be sitting at 9 once fully warm.I'm concerned what damage I am doing the car when the tempo not reaching fully 9'oclock.The car seems to be driving fine.Its due a service[prob on Tues] so will get the thermostat checked then.Thanks again Del