Long time to get hot - Page 2

DieselDoNicely · Dec 20th, 2004, 22:07

My 850 Tdi is in perfect running order on the coolant side. It takes 5 miles at -3 to get to running temp. The gauage is always in the 3 o clock position summer or winter. Some times if its really cold -12 here it take longer to get hot.

warthog · Dec 21st, 2004, 13:10

These forums are great. Nearly every time I learn something new. I've never seen this trick used before to aid the heater.

Wishing one and all a happy Christmas.

RoscoMac · Jan 7th, 2005, 14:02

Did you happen to notice the opening temp stamped on either the old or the new thermostat??

Thanks

R.

jaytee · Jan 7th, 2005, 14:49

A BIT OF AN UPDATE

The little black box I referred to contains two relays, one wired to two of the glo-plugs and the second wired to one. The relays are controlled by the ecu. via two of the three wires in the connector on the relay box. The Gr/Or wire (from ecu connector 37) operates the relay with two glo-plugs, via the terminal (6) - 2 black leads. The Gn/Gr from 23, does the single plug, terminal (5) - 1 black lead. The thick red/black lead is the supply from 50amp fuse #3. the third thin wire at the connector (gn/y) is earthed. I have not yet been able to find out what condition the ecu needs to see before energising the relays, I think this will be via a 5 or 8 volt supply??

Any more info on the operation of this circuit would be helpful.

I have the wiring diagram for the circuit, if anyone needs a copy I can email it.

Jim

Dec 20th, 2004, 22:07	#11
DieselDoNicely Premier Member Last Online: Apr 25th, 2024 19:01 Join Date: Nov 2003 Location: Brecon	RE: Long time to get hot My 850 Tdi is in perfect running order on the coolant side. It takes 5 miles at -3 to get to running temp. The gauage is always in the 3 o clock position summer or winter. Some times if its really cold -12 here it take longer to get hot.

Dec 21st, 2004, 13:10	#12
warthog VOC Member Last Online: Oct 30th, 2021 14:51 Join Date: Dec 2001 Location: Bristol	RE: Long time to get hot These forums are great. Nearly every time I learn something new. I've never seen this trick used before to aid the heater. Wishing one and all a happy Christmas. __________________ Brian '96 T5 Estate Auto

Jan 7th, 2005, 14:02	#13
RoscoMac Scottish Section Chair Last Online: Apr 21st, 2024 11:03 Join Date: Dec 2002 Location: Ayrshire View Photos By: RoscoMac	RE: Long time to get hot Did you happen to notice the opening temp stamped on either the old or the new thermostat?? Thanks R.

Jan 7th, 2005, 14:49	#14
jaytee Jim Last Online: Nov 30th, 2023 12:28 Join Date: Dec 2001 Location: Edinburgh	RE: Long time to get hot A BIT OF AN UPDATE The little black box I referred to contains two relays, one wired to two of the glo-plugs and the second wired to one. The relays are controlled by the ecu. via two of the three wires in the connector on the relay box. The Gr/Or wire (from ecu connector 37) operates the relay with two glo-plugs, via the terminal (6) - 2 black leads. The Gn/Gr from 23, does the single plug, terminal (5) - 1 black lead. The thick red/black lead is the supply from 50amp fuse #3. the third thin wire at the connector (gn/y) is earthed. I have not yet been able to find out what condition the ecu needs to see before energising the relays, I think this will be via a 5 or 8 volt supply?? Any more info on the operation of this circuit would be helpful. I have the wiring diagram for the circuit, if anyone needs a copy I can email it. Jim

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