Member Since: 18 May 2015
Location: Reading, Berks
Posts: 67
Timed Climate - vents on but no FBH or flashing auto light
Sorry to start another FBH thread...however....Timed Climate was working perfectly on our MY12 HSE but stopped working some point last week. I've done some testing and have noticed that at the preset time the blowers inside the car do come on, but the FBH doesn't seem to fire and I've also noticed that the AC Auto light which usually flashes when the Timed Climate has activated is not lit. Any ideas where to start looking? Thanks.
15th Jan 2016 7:06 pm
Russell
Member Since: 24 Aug 2007
Location: Kent
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How cold is it where you are? Does the FBH fire up when you start the car in cold conditions or is it not working at all?MY17 D5 1st Edition Namib Orange
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15th Jan 2016 7:09 pm
viethson
Member Since: 13 Jan 2009
Location: Bavaria
Posts: 136
Maybe low battery. Try recharging and try again.Life in the slow lane
15th Jan 2016 7:15 pm
daviesto
Member Since: 18 May 2015
Location: Reading, Berks
Posts: 67
It failed to fire on timed first thing this morning when the temp was minus one and the car had been standing overnight. I was doing some testing when I got back from work today, temp about 2 degrees, engine cold. I suppose a low battery is possible but then why would the vents activate? There's plenty of fuel in it. I'll go and check now whether the FBH fires when the engine is started.
15th Jan 2016 7:20 pm
daviesto
Member Since: 18 May 2015
Location: Reading, Berks
Posts: 67
Difficult to tell whether it fired on engine start. Will check it more carefully in the morning. Is there a fuse for FBH that I should check?
15th Jan 2016 7:56 pm
Dudleydisco
Member Since: 20 Jun 2014
Location: York
Posts: 853
The other thing to do is get your codes read. I had a module communication error, which stopped the FBH firing, but once I cleared the fault, it was back to working correctly.D4 MY14 XXV - RLD/IID BT
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15th Jan 2016 8:14 pm
daviesto
Member Since: 18 May 2015
Location: Reading, Berks
Posts: 67
Did some more testing this morning and I'm pretty sure the FBH doesn't start with the engine either. Car had been standing overnight, outside temp zero. Started engine and even after a couple of mins the FBH exhaust was still cold. FBH fuse intact.
16th Jan 2016 1:36 pm
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Member Since: 06 Nov 2006
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Ok, so now your battery has a little boost, switch the engine off, switch ignition off, switch the radio on and then on timed climate option, hit the manual heat button on the screen. Does it try firing up then?Bodsys Brake Bible
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16th Jan 2016 3:49 pm
daviesto
Member Since: 18 May 2015
Location: Reading, Berks
Posts: 67
I've also just noticed that the Timed Climate menu on the Touch Screen is greyed out whenever the engine is running. I don't think it behave that way prior to the FBH fault but can someone confirm?
16th Jan 2016 7:53 pm
geoff.
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
Turn the engine off and see if it's still greyed out
16th Jan 2016 8:01 pm
daviesto
Member Since: 18 May 2015
Location: Reading, Berks
Posts: 67
Not greyed out when engine off I.e. Either ignition on prior to starting or stop engine then press audio standby to turn screen back on. If you have ignition on, timed climate button is active but greys as the engine starts.
16th Jan 2016 8:13 pm
daviesto
Member Since: 18 May 2015
Location: Reading, Berks
Posts: 67
Dropped by my indie last week. FBH locked out. Fault cleared through SSD, purged and tested. All working correctly again. It is kind of irritating that these can get locked out and the only way to get it unlocked is through a diagnostic tool. I appreciate that the FBH shouldn't run when the fuel is low, but why doesn't it just unlock again when the fuel level increases?
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