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Author Topic: aircon  (Read 2193 times)

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bigbadee

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aircon
« on: 09 July 2012, 15:48:40 »
hi all have looked on the serch section and no one seems to have quite the same problem as me so here goes the air con fan one infront of the rad seems to be on all the time when the egnition is switched on can get hot and cold air from heater air con has never been that good problem started arfter i fitted a new alternator or shortly arfterwards have tried to reset aircon by pressing auto and off button(did this with egn turned on)didnt get a buzz what happened was heater fan came on ran through all speeds air blew through all thew different vents and then stayed on turned off and air con fan still running only turns off when key turned off any help please as dont want to burn the fan out thanks
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RobG

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Re: aircon
« Reply #1 on: 09 July 2012, 16:25:29 »
Quote from: bigbadee on 09 July 2012, 15:48:40
hi all have looked on the serch section and no one seems to have quite the same problem as me so here goes the air con fan one infront of the rad seems to be on all the time when the egnition is switched on can get hot and cold air from heater air con has never been that good problem started arfter i fitted a new alternator or shortly arfterwards have tried to reset aircon by pressing auto and off button(did this with egn turned on)didnt get a buzz what happened was heater fan came on ran through all speeds air blew through all thew different vents and then stayed on turned off and air con fan still running only turns off when key turned off any help please as dont want to burn the fan out thanks
Does it stop when you switch C/C off
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bigbadee

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Re: aircon
« Reply #2 on: 09 July 2012, 16:37:22 »
fan keeps running with c/c on or off can only seem to stop fan by turning eng off and removing key as soon as key turned back on fan kicks in
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TheBoy

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Re: aircon
« Reply #3 on: 09 July 2012, 18:42:56 »
Couldn't really understand the question, as it was unreadable, but I think your fans are permemently running on your 2.5TD?

Sounds like, assuming its still on with the A/C off, that some idiot has permenently wired the fan on, probably due to overheating due to poor servicing.

Look for bodged wiring.
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bigbadee

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Re: aircon
« Reply #4 on: 09 July 2012, 18:53:48 »
dont understand why the question is unreadable but its a 2.2 and has two fans its the aircon fan not engine cooling fan thats on all the time and its only just started so not a bodged wiring problem engine fan still works as it should
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TheBoy

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Re: aircon
« Reply #5 on: 09 July 2012, 18:57:29 »
Quote from: bigbadee on 09 July 2012, 18:53:48
dont understand why the question is unreadable
No punctuation at all. Makes it unreadable.
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TheBoy

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Re: aircon
« Reply #6 on: 09 July 2012, 18:59:06 »
Quote from: bigbadee on 09 July 2012, 18:53:48
has two fans its the aircon fan not engine cooling fan thats on all the time
IIRC, both are used for cooling if required. Precisely which fan is it.

Which engine is it, I'll look at wiring diagrams :)
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bigbadee

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Re: aircon
« Reply #7 on: 09 July 2012, 19:11:22 »
there are two fans one engine side of rad and one grill side its the one grill side its a 2.2 diesel 2003 plate
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TheBoy

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Re: aircon
« Reply #8 on: 09 July 2012, 19:16:27 »
OK, to isolate it on the schematics, can you pull fuses F34 and F42 and see which stops it. That helps me to find which part of the engine cooling circuit needs checking.
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bigbadee

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Re: aircon
« Reply #9 on: 09 July 2012, 21:09:04 »
pulled f34 fan still running put it back then pulled f42 still running pulled both still running,started pulling fuses one at a time and f4 turns it off if that helps.
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TheBoy

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Re: aircon
« Reply #10 on: 09 July 2012, 21:13:42 »
Hmmm, weird.

What about coolant temp switch, S66
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bigbadee

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Re: aircon
« Reply #11 on: 09 July 2012, 21:24:50 »
getting dark now so will look in the morning and let you know, when you say s66 is this the one in rad by the top hose oh and thanks for help and patience so far
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Big_Al

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Re: aircon
« Reply #12 on: 09 July 2012, 22:40:03 »
Quote from: bigbadee on 09 July 2012, 21:24:50
getting dark now so will look in the morning and let you know, when you say s66 is this the one in rad by the top hose oh and thanks for help and patience so far


The one thing you need when owning an Omega is  . . patience !       but don't worry TB  has plenty  8)  sure he can sort it for you  :y
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bigbadee

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Re: aircon
« Reply #13 on: 10 July 2012, 17:08:02 »
had another look at fuses today.pulled the fan conector apart and used a test meter on it when i pulled f52?(of the 2 orange 40 amp fuses under the bonnet next to the battery the one nearest the bulkhead) with the fuse in meter read 12volt when fuse pulled it droped to 8 volt. someone has suggested that it might be a lazy relay so pulled number 6 and fan has stoped so if that helps anyone .pulled wire of what i think is temp sensor ,blue conector at the back of engine didnt make any difference.
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