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After turning on FBH , how do I turn it off ?
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Bi Ullamh
 


Member Since: 01 Sep 2011
Location: County Laois
Posts: 7

Ireland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3
After turning on FBH , how do I turn it off ?

Hi , I have a 2005 2.7 HSE with the red wire factory installed in the Webasto heater. I purchased on eBay a circuit that gives the Wbus output. I've cut the red wire and connected my Wbus output to it. When I power up the circuit board the FBH starts perfect and heats the coolant pipes. When I remove power from the Wbus circuit board ,the FBH keeps running. When I then removed my Wbus wire from the red wire the FBH still runs . I've let it run for 30 mins after disconnecting my Wbus circuit , then started the Disco for a short period and turned the engine off and it still runs . The Disco says the outside temperature is 13 degrees C. It appears the only way I can stop it is to remove fuse 28 under the bonnet. Is the bottom right 2 pin plug the 12V supply to the FBH ?, so by breaking this circuit after a set time could I turn off the heater ?
I know there's lots of info out there but I can't figure out how to stop the FBH simply.
I know I could of bought some fancy FBH kits but nothing beats the smile on your face when you figure a cheap way of doing it yourself , or more often, the frustration of someone saying " I told you that would never work"
  
Post #18661368th Oct 2017 1:58 pm
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Erea
 


Member Since: 19 Mar 2012
Location: Munster
Posts: 673

Ireland 2006 Discovery 3 TDV6 Commercial Manual Zambezi SilverDiscovery 3

Everyone will be jealous of that problem. I can only get mine to run for two minutes and then it shuts down. Can you put a link to what you bought?
As far as I know it needs to go through a shutdown process so simply cutting the power will work but might not be the best way of doing it. Is it that it is trying to get the temp up fully or just ignoreing every thing and blasting away.
  
Post #18661418th Oct 2017 2:33 pm
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Narpy
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Member Since: 18 Jul 2011
Location: Stockport
Posts: 6122

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

That's correct. The FBH continues to run but it will purge itself and will eventually shut down, but does take a couple of minutes.
Have patience and I think you'll find it's working correctly. Thumbs Up

I personally wouldn't start pulling fuses, you're likely to upset it and they're temperamental things as it is. Wink
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Post #18661588th Oct 2017 3:04 pm
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Aerialmark
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England 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Warm hands warm car Ian Bow down Thumbs Up Just cold backside and burnt right leg Shocked (heated seat element broke Big Cry )
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Post #18661688th Oct 2017 3:21 pm
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Bi Ullamh
 


Member Since: 01 Sep 2011
Location: County Laois
Posts: 7

Ireland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

https://www.ebay.ie/i/162590138547
  
Post #18661868th Oct 2017 4:03 pm
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Bi Ullamh
 


Member Since: 01 Sep 2011
Location: County Laois
Posts: 7

Ireland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

That's the ebay link for the Wbus converter. As I said it was running for 30 mins , the pipes were hot to touch and it didn't seem like it was going to stop . I had bought a 12V countdown timer on eBay for a couple of euro that I was going to set for say 15 mins and I thought this is easy and it was, if the FBH heater would just stop when the timer turns off the power to the Wbus converter.
  
Post #18661898th Oct 2017 4:09 pm
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