FBH external temperature sensor

black olive · 19th November 2010, 07:07

As always at this time of year, loads of webasto FBH queries, some related to " the weather has gone colder but my FBH isnt fifing up".

found this snippet of info- the original external temperature sensor fitted to our cars has a wide temperature tolerance, and a better freelander version is available

This is the Freelander fix if the ambient sensor is not working as expected and this will be the part I would buy if MGR do not offer an equivalent improved version

PROBLEM:
POOR HEATER PERFORMANCE FROM COLD ENGINE START UP
The customer complains of excessive delay in obtaining satisfactory heater output
following a cold start.

CAUSE:
Due to an excessively wide sensing tolerance, the outside air temperature sensor
may not activate the FBH until the ambient temperature is as low as 0 o C.
This renders the FBH inactive at temperatures where its additional heat output
would be beneficial in assisting with engine and heater warm up.

ACTION:
On customer complaint, replace the outside air temperature sensor with the new
narrow range sensor

PARTS INFORMATION:
JWL000020 Sensor - outside air temperature
NOTE: The body of the new part is now moulded in green to distinguish it from its
predecessor.

googling the part number brings up this thread

http://www.the75andztclub.co.uk/foru...ght=fbh+sensor

T16 · 15th November 2012, 12:57

Has anyone actually tried one of these and found it works better?

suffolk boy · 15th November 2012, 13:06

i am also waiting for some answers on this .i am instead going to fit a manual switch turn it on when i like then.as long as remember to turn it off

oldcarguy · 15th November 2012, 14:17

Well I bought a couple and put one in the fridge which is 4 degrees and it switched.

T16 · 15th November 2012, 14:18

Ahhh but did it switch teh FBH on?!

oldcarguy · 15th November 2012, 15:28

I'll let you know that as soon as we get a cold morning

T16 · 15th November 2012, 15:33

With the amount of people moaning about broken sensors, the fact that the original one is so inaccurate, and the fact the Rover one is nearly £50, and finally the fact that I got the "uprated" version of the sensor for £20, I decided just to get the new one anyway.

Did you have to take the bumper right off?

Ive got small wrists, reckon I could swap them with jsut the undertray removed?

Cheers.

vindaloo · 15th November 2012, 15:56

Quote:

Originally Posted by T16

.........

Ive got small wrists, reckon I could swap them with jsut the undertray removed?

Cheers.

Definitely

T16 · 16th November 2012, 10:39

Quote:

Originally Posted by vindaloo

Definitely

Good!

Does its bracket have to be unscrewed, or do you just unplug the connector and pull the sensor out?

vindaloo · 16th November 2012, 11:42

Doesn't really have a bracket, the connector holds it in.

19th November 2010, 07:07	#1
black olive I really should get out more....... 260 SE vin 214 ( last mark 1 260 ) Join Date: Dec 2006 Location: Lancashire Posts: 2,009 Thanks: 1 Thanked 8 Times in 4 Posts	FBH external temperature sensor As always at this time of year, loads of webasto FBH queries, some related to " the weather has gone colder but my FBH isnt fifing up". found this snippet of info- the original external temperature sensor fitted to our cars has a wide temperature tolerance, and a better freelander version is available This is the Freelander fix if the ambient sensor is not working as expected and this will be the part I would buy if MGR do not offer an equivalent improved version PROBLEM: POOR HEATER PERFORMANCE FROM COLD ENGINE START UP The customer complains of excessive delay in obtaining satisfactory heater output following a cold start. CAUSE: Due to an excessively wide sensing tolerance, the outside air temperature sensor may not activate the FBH until the ambient temperature is as low as 0 o C. This renders the FBH inactive at temperatures where its additional heat output would be beneficial in assisting with engine and heater warm up. ACTION: On customer complaint, replace the outside air temperature sensor with the new narrow range sensor PARTS INFORMATION: JWL000020 Sensor - outside air temperature NOTE: The body of the new part is now moulded in green to distinguish it from its predecessor. googling the part number brings up this thread http://www.the75andztclub.co.uk/foru...ght=fbh+sensor __________________ [SIGPIC][/SIGPIC]

15th November 2012, 13:06	#3
suffolk boy This is my second home fiat panda Join Date: Sep 2009 Location: haverhill Posts: 6,720 Thanks: 96 Thanked 586 Times in 526 Posts	i am also waiting for some answers on this .i am instead going to fit a manual switch turn it on when i like then.as long as remember to turn it off __________________ fiat panda 1.2 eco

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15th November 2012, 12:57	#2
T16 I really should get out more....... ZT CDTi 135, ZT260SE Join Date: Feb 2011 Location: Dundee Posts: 2,877 Thanks: 10 Thanked 331 Times in 213 Posts	Has anyone actually tried one of these and found it works better?

15th November 2012, 14:17	#4
oldcarguy Posted a thing or two Rover 75 Conn SE Tourer Join Date: Aug 2011 Location: Driffield Posts: 1,952 Thanks: 27 Thanked 151 Times in 125 Posts	Well I bought a couple and put one in the fridge which is 4 degrees and it switched.

15th November 2012, 14:18	#5
T16 I really should get out more....... ZT CDTi 135, ZT260SE Join Date: Feb 2011 Location: Dundee Posts: 2,877 Thanks: 10 Thanked 331 Times in 213 Posts	Ahhh but did it switch teh FBH on?!

15th November 2012, 15:28	#6
oldcarguy Posted a thing or two Rover 75 Conn SE Tourer Join Date: Aug 2011 Location: Driffield Posts: 1,952 Thanks: 27 Thanked 151 Times in 125 Posts	I'll let you know that as soon as we get a cold morning

15th November 2012, 15:33	#7
T16 I really should get out more....... ZT CDTi 135, ZT260SE Join Date: Feb 2011 Location: Dundee Posts: 2,877 Thanks: 10 Thanked 331 Times in 213 Posts	With the amount of people moaning about broken sensors, the fact that the original one is so inaccurate, and the fact the Rover one is nearly £50, and finally the fact that I got the "uprated" version of the sensor for £20, I decided just to get the new one anyway. Did you have to take the bumper right off? Ive got small wrists, reckon I could swap them with jsut the undertray removed? Cheers.

16th November 2012, 11:42	#10
vindaloo Ex Owner MX-5 ND2 RF Join Date: Sep 2010 Location: Leigh Posts: 6,574 Thanks: 462 Thanked 799 Times in 524 Posts	Doesn't really have a bracket, the connector holds it in.