Help for a nerd about fbh - Page 10

pinebob · 4th November 2011, 11:36

right one here for harry.from my log cabin down to reception is about 1000yds got in car this morning outside temp reading 12deg drove down to reception wife popped in to collect post felt warm air blowing from screen vents temp gauge still not moved from zero "HOW".

FrenchMike · 4th November 2011, 12:34

Quote:

Originally Posted by blacknwhite

Harry, I've been wondering if I had a problem with my FBH. I have had car on the drive for a few days, opened the car and popped the bonnet to do some work on it. No keys in the ingition or anything. The FBH seems to do something, best I can describe it as is a whirling type whine which drops off in tone to nothing. Seems to last for 5-10secs. It's not been cold or anything, but it's done it a few times after I've opened the bonnet.

Does that make any sense? Is it supposed to do that?

Hi,

Your PCB definitely faulty ;but you can send it to me

it will cost you one handwork hour cleaning,repair,test report : £40

Mike

pinebob · 4th November 2011, 12:44

Quote:

Originally Posted by frenchmike

hi,

your pcb definitely faulty ;but you can send it to me

it will cost you one handwork hour cleaning,repair,test report : £40

mike

hi mike sorry to hyjack but read my last post.can you tell me why my car seems to be blowing warm air when temp gauge is still at zero and outside temp at 12deg.

FrenchMike · 4th November 2011, 13:01

Quote:

Originally Posted by pinebob

hi mike sorry to hyjack but read my last post.can you tell me why my car seems to be blowing warm air when temp gauge is still at zero and outside temp at 12deg.

Hi Bob,

Well,curious ? free energy ?
firstly 12 deg is fairly warm ;
secondly,don't trust the gauge ;use rather the OBD in 7.0 to get the
real engine temp.
however,are you sure your webasto is off (no tubine noise etc..)

Mike

pinebob · 4th November 2011, 13:10

I had only traveled a few 100yds down to reception area and it was def blowing warm air from screen vents,temp gauge had not moved from zero.DID NOT THINK FBH CAME ON ABOVE 5DEG.

FrenchMike · 4th November 2011, 13:20

Quote:

Originally Posted by pinebob

I had only traveled a few 100yds down to reception area and it was def blowing warm air from screen vents,temp gauge had not moved from zero.DID NOT THINK FBH CAME ON ABOVE 5DEG.

No mystery ;unless the FBH 5 deg switch is permanently closed.
Wait for colder days an try again...

pinebob · 4th November 2011, 13:26

Quote:

Originally Posted by FrenchMike

No mystery ;unless the FBH 5 deg switch is permanently closed.
Wait for colder days an try again...

will do cheers mike

man of kent · 18th November 2011, 13:59

Everywhere on the forum is talk of the engine not heating up enough to open the standard thermostat. On the webasto site it shows a water pump (not sure how its driven). If the standard thermostat is closed, surely the pump will just cavitate? If this is so, I have just fitted a top hose thermostat and wonder what effect it will have on the webasto FBH

BigRuss · 18th November 2011, 14:41

Quote:

Originally Posted by man of kent

Everywhere on the forum is talk of the engine not heating up enough to open the standard thermostat. On the webasto site it shows a water pump (not sure how its driven). If the standard thermostat is closed, surely the pump will just cavitate? If this is so, I have just fitted a top hose thermostat and wonder what effect it will have on the webasto FBH

Especially in Winter when the cabin heater being used the engine often will not generate enough heat for the thermostat to open.

The Webasto waterpump on the FBH is electrically operated and circulates the coolant through the FBH and cabin heater matrix.

The whole heater circuit including the FBH is on the engine side of the thermostat so there's no chance of cavitation as it's a seperate system that's unaffected by the operation of the thermostat, the same is true if you have an in-hose thermostat fitted

Russ

man of kent · 18th November 2011, 15:40

I think I will have to get a timer somewhere so I can fire it up occasionally during the summer. Ebay? Hope the wiring is not too difficult. On another site today somebody has found one in the centre console storage box. Mine has not run since last winter so hope it fires up ok.

4th November 2011, 11:36	#91
pinebob Posted a thing or two rover75 cdt Join Date: Mar 2011 Location: ALFORD lincolnshire Posts: 1,216 Thanks: 107 Thanked 53 Times in 40 Posts	right one here for harry.from my log cabin down to reception is about 1000yds got in car this morning outside temp reading 12deg drove down to reception wife popped in to collect post felt warm air blowing from screen vents temp gauge still not moved from zero "HOW".

4th November 2011, 13:10	#95
pinebob Posted a thing or two rover75 cdt Join Date: Mar 2011 Location: ALFORD lincolnshire Posts: 1,216 Thanks: 107 Thanked 53 Times in 40 Posts	I had only traveled a few 100yds down to reception area and it was def blowing warm air from screen vents,temp gauge had not moved from zero.DID NOT THINK FBH CAME ON ABOVE 5DEG.

18th November 2011, 13:59	#98
man of kent Loves to post 75 tourer auto diesel Join Date: Nov 2010 Location: Nordelph, nr Downham Market Posts: 419 Thanks: 0 Thanked 0 Times in 0 Posts	Everywhere on the forum is talk of the engine not heating up enough to open the standard thermostat. On the webasto site it shows a water pump (not sure how its driven). If the standard thermostat is closed, surely the pump will just cavitate? If this is so, I have just fitted a top hose thermostat and wonder what effect it will have on the webasto FBH

18th November 2011, 15:40	#100
man of kent Loves to post 75 tourer auto diesel Join Date: Nov 2010 Location: Nordelph, nr Downham Market Posts: 419 Thanks: 0 Thanked 0 Times in 0 Posts	I think I will have to get a timer somewhere so I can fire it up occasionally during the summer. Ebay? Hope the wiring is not too difficult. On another site today somebody has found one in the centre console storage box. Mine has not run since last winter so hope it fires up ok.