Advertise on DISCO3.CO.UK
Forum · Gallery · Wiki · Shop · Sponsors
DISCO3.CO.UK > Webasto Fuel Burning Heater

FBH dead after recent service - overheating issue
Post Reply  Down to end
Page 1 of 1
chrisoverson
 


Member Since: 10 Dec 2020
Location: Bideford
Posts: 29

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3
FBH dead after recent service - overheating issue

Hi all!

My lovely FBH came out for a good strip down and clean last Sunday, went back in and worked fine... For a couple of days.

Now it won't start at all. Checked with the webasto wtt software, it's showing an overheating error and I'm not surprised, the temperature is permanently stuck at 138c!

I'm guessing the sensor is at fault, and I'm hoping I've been an idiot and pinched a wire or something reassembling, but before I rip it back out again which I'm not eager to do, is there anything else I should try or check?

I've tried pulling the fuse, resetting via webasto software multiple times and checking all connections I can reach without removal or teardown.

Thanks in advance!
  
Post #22082355th Feb 2021 7:56 pm
View user's profile Send private message View poster's gallery Reply with quote
chrisoverson
 


Member Since: 10 Dec 2020
Location: Bideford
Posts: 29

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3
Found the culprit.. what now?

Whistle

So I found the culprit.



The coolant temperature sensor (G1 in the workshop manual) should read between 1998 ohms and 4050 ohms at room temperature. It's around 130 ohms.

So I need a new sensor right? I can't find one anywhere, but by some research and going by the workshop manual values, I've identified that it's almost certainly a 2.2k NTC Thermistor.

Now, I don't have one. I'd really love to put the car back together this weekend, so here's my question:

If I just replace this sensor with a resistor for now, then later wire it up to a thermistor and attach that to the coolant system somehow, is that going to matter? It still has the overheating cutout sensor, and as far as I can tell, the burn is not really controlled by the sensor but by using the glowplug as a flame detector.

My temp fix would make the fbh permanently believe the coolant temperature is around room temp. Should I be concerned about safety here for any reason? As it'll only be triggered to run by my command or the car itself, it should never run to the degree the coolant is overheated anyway - It never gets further than a quarter on the temp gauge even after 30 minutes.

Be interested to see what anyone thinks, I'll try not to blow myself up Very Happy
  
Post #22083666th Feb 2021 1:38 pm
View user's profile Send private message View poster's gallery Reply with quote
rangehelper
 


Member Since: 04 Nov 2011
Location: Maidstone
Posts: 52

United Kingdom 

LR004235 the part number that is needed
  
Post #22088527th Feb 2021 10:14 pm
View user's profile Send private message View poster's gallery Send e-mail Reply with quote
rangehelper
 


Member Since: 04 Nov 2011
Location: Maidstone
Posts: 52

United Kingdom 

don't experiment, it's your safety!
  
Post #22088537th Feb 2021 10:15 pm
View user's profile Send private message View poster's gallery Send e-mail Reply with quote
chrisoverson
 


Member Since: 10 Dec 2020
Location: Bideford
Posts: 29

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Thank you!

I looked everywhere for this but couldn't find a part anywhere.

I've ordered 2 from the local landy garage - and yes you're right, I did bodge it to see if it would work (which it did) but then chose to disable it to be safe.
  
Post #22089508th Feb 2021 12:57 pm
View user's profile Send private message View poster's gallery Post Reply
Display posts from the last:  
Post Reply Back to top
Page 1 of 1
Jump to:  
Previous Topic | Next Topic >


Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



DISCO3.CO.UK Copyright © 2004-2024 Futuranet Ltd & Martin Lewis
DISCO3.CO.UK RSS Feed - All Forums

DISCO3.CO.UK is independent and not affiliated to Land Rover.
Switch to Mobile Site