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        General >> Problems >> a/c compressor fuse
        
(Message started by: Chieftain on Mar 27^th, 2007, 10:22pm)

Title: a/c compressor fuse
Post by Chieftain on Mar 27^th, 2007, 10:22pm

whilst looking in the aux fuse box I noticed that the 30amp fuse for the compressor is missing, what problems could there have been to remove the fuse or did previous owner find that it was to cold. The climate control system is working fine OR does cossie not have a fuse there anyway, over to the panel ;D Doh just realised by looking at the faults pages that 24V has a seperate belt so of course it would run with seized compressor simply by removing belt, fingers crossed thta when I look there will be a belt fitted.

Title: Re: a/c compressor fuse
Post by jonnycab on Mar 27^th, 2007, 11:15pm

Is your air-con compressor working fine without the fuse in ?

The reason I ask is because when I bought my 2.3 a year ago the same fuse was also missing. I assumed the reason was because the compressor had seized :-/

Title: Re: a/c compressor fuse
Post by Chieftain on Mar 28^th, 2007, 8:21am

Will have to check that out, I note that if I turn a/c off then on there seems to be no noticable drop in revs which was very obvious in my Mk3. Would I be correct that if the compressor had seized then it would be noticable, noise etc, as it is my sytem runs with no strange noises so not sure :o

Title: Re: a/c compressor fuse
Post by Chieftain on Mar 28^th, 2007, 12:35pm

Well just looked and there is a fan belt to the a/c compressor and the compressor turns, so next stage is to fit a fuse and see

Title: Re: a/c compressor fuse
Post by scorpio_man on Mar 28^th, 2007, 12:43pm

hi there

yes, noise and maybe smoke! sounds like a metal rattle. my s/h one is a bit on the noisy side, but works fine. i've another one in my shed for when it dies.

hth

Title: Re: a/c compressor fuse
Post by cleave on Mar 28^th, 2007, 5:13pm

my fuse is missing too.replaced it when i noticed and nothing any different seemed 2 b happening so i took it out again :-/

Title: Re: a/c compressor fuse
Post by Chieftain on Mar 28^th, 2007, 10:26pm

Well replaced the fuse, switched on and all seemed ok, tried a/c and it works a treat, so my only 2 options are, they removed fuse to stop compressor making it to cold :o or 30amp fuse blown nearest replacment a/c and never replaced it with new fuse. Still at least not new compressor.

Title: Re: a/c compressor fuse
Post by scorpio_man on Mar 29^th, 2007, 8:12am

hi bob

i'd get it in for a a/c service asap. you don't know how long it was off for. they have to run for at least 30 mins every month to keep the special pag flowing in the system. every year is loses about 25% of it's gas/oil.

see here. (http://www.fordscorpio.co.uk/acrecharge.htm)

Title: Re: a/c compressor fuse
Post by Mummra on Mar 29^th, 2007, 6:27pm

Was it fuse no 35 that was missing? If so I believe that fuse is not for the air conditioning compressor, but for an air compressor which I think was used on earlier estates as part of the self levelling suspension. I fell into the same trap on mine, I believe that the a/c compressor is connected to fuse 33.

Title: Re: a/c compressor fuse
Post by Chieftain on Mar 30^th, 2007, 8:16am

on 03/29/07 at 18:27:33, Mummra wrote:

Very intresting, anyone confirm this?

Title: Re: a/c compressor fuse
Post by Simmo on Mar 30^th, 2007, 9:27am

The listed fuses are: 30...Self-levelling suspension
33. ..Ignition timing
35....Air conditioning compressor. if that helps.

Title: Re: a/c compressor fuse
Post by Chieftain on Mar 30^th, 2007, 11:20am

seems to clear it up although the handbook only says air compressor, but the self levelling is mentioned twice with its own fuses, so it seems that 35 is for a/c ;D

Title: Re: a/c compressor fuse
Post by ferretmobile on Mar 30^th, 2007, 12:21pm

Scorpio man, can you change the compressor without loosing the coolant?
I had my gas & oil topped up last summer and the system works intermitantly...kinda comes on every nown and again in hot weather. I am suspecting the compressor is on the blink and I would like to get everything tikkerteboo before the hot weather decends and sitting in a hot cab aint much fun.
If it can be changed, is this easy for a complete spanner muppet like myself? }{
Ferret

Title: Re: a/c compressor fuse
Post by scorpio_man on Mar 30^th, 2007, 12:44pm

on 03/30/07 at 12:21:22, ferretmobile wrote:

i'll start at the easy bit first. no, you'll lose all the gas/oil if you change the compressor. this needs to be taken out by a a/c guy. ;) changing the compressor is more of a pain than hard, if you know what i mean. it's quite heavy to hold above your head when bolting it back on. i tied mine up with some rope.

re only working every now and then. what do mean? the compressor only kicks on and off? if so, this is correct. it runs until the de ice switch hit +4 degrees, then goes off until the temp rises. it then repeats the cycle.
or do you mean the heat fans (hbc) only work occasionally?

let me know what you mean.

Title: Re: a/c compressor fuse
Post by ferretmobile on Mar 30^th, 2007, 1:38pm

Hi Andrew, I always have the A.C. on default to heat the car which is no problem. When the mobile gas man came to call (appol flanders and swan), He put a thermal probe into the mid vents with all other vents shut off and the temperature set at lo-lo. The low temp would fluctuate between real chilly or at least 10 below the outside ambiant temperature and then the reading would climb up to the outside temperature. He removed all of the gas and oil and regassed the system again with the same result. He asked me to sit in the cab and keep the throttle open to about 2000 revs. But he still could not get the temperature at a constant chill.
When driving the chill factor sometimes comes on and stays on. But the following day I get no joy at all. So thats why I tend to think that the compressor is at fault.
I would appreciate your thoughts on this annoying fault.
Oh, I have also done numerous resets on the controll panel ...to no effect
Regards Ferret

Title: Re: a/c compressor fuse
Post by Mummra on Mar 30^th, 2007, 1:49pm

When I had my a/c re-gassed last year we found that the compressor was not working and noticed that fuse 35 was missing, so I put one in. It still didn't work, so checked my handbook again and found that fuse 33 20A is for Power Steering, self levelling suspension, heating/ventilation, air conditioning.

Upon checking this fuse I found that it had blown, so I removed fuse 35 again and replaced 33 and the compressor fired up perfectly after that.

So not sure about fuse 35, except that I have 2 Estates, neither of which have that fuse fitted but with working a/c.

Title: Re: a/c compressor fuse
Post by scorpio_man on Mar 30^th, 2007, 2:34pm

hi there

when the a/c is running, does the s/steel pipes go freezing cold? are you sure the compressor is running. watch the '3 lumps' on the compressor clutch. i would think the compressor is either working, siezed (you'd heard/smell/see it) or working/leaking. even if it was leaking, the pipe would become cold (unless no gas, compressor won't run) as it's just a pump.
next thing to check is the de-ice switch. see this (http://www.fordscorpio.co.uk/deicetest.htm).
what speed are your engine fans at (a/c on)? high or slow?
have you checked the multi-plug on the compressor? might be dirty.

sorry this post is a bit messy. just thinking and typing. can't figure out why it works sometimes. it should work or not at all. :-/

let me know if the compressor is running.

Title: Re: a/c compressor fuse
Post by ferretmobile on Mar 30^th, 2007, 2:53pm

Hello Andrew, yes its the clutch with the three lumps that dosent actuate all of the time. Dont know why. Sometimes it picks up and then I have very cold in the cab. Yuo say that there is a multiplug that may need cleaning...Where can this be located and do you think that this may be the culprit.
Oh and I am sorry to be such a pain ;)

Title: Re: a/c compressor fuse
Post by Snoopy on Mar 30^th, 2007, 3:44pm

Hi Ferret the compressor is supposed to cycle it is NOT engaged ALL the time just depends on how much cooling it has to do. I liken it to a fridge motor , which switched on and off as the tepmperature rises and falls.

I hope that answers your query.

Title: Re: a/c compressor fuse
Post by ferretmobile on Mar 30^th, 2007, 3:52pm

Hi Snoopy, yes I understand that much, but often my clutch wont go at all and all I get in the cab is warm ambiant temp air.
I cant tell you how many hours I have spent watching the three little protusions and waiting for them to fly round ......and they dont. This is the main problem.
HTH Ferret

Title: Re: a/c compressor fuse
Post by Snoopy on Mar 30^th, 2007, 5:41pm

Sorry I misunderstood what you meant. and you are NOT a pain ! We are ALL here to try and HELP.

Check the relays as well. They can be a source of intermitent working.

Title: Re: a/c compressor fuse
Post by ferretmobile on Mar 31^st, 2007, 1:02pm

I have just been out fetterling the wiper arms and so had a look see at the AC and what is occuring. I set up the system to lolo and closed all vents except the middle top and at first the system gave out nice cold air...great I thought. Then it dropped down to outside ambiant temperature. I checked the clutch on the compressor and the three protusions where not moving at all. Got back into cab and turned off the A.C. switch and then turned it back on. Same effect, at first cold air and then after about half a minute it resorts to ambiant.
I went back to the engine and the two aluminium pipes that form part of the system, one felt warm and the other felt cool/ cold. Despite my turning the system on and off, at no time did the AC clutch move..perhaps it was playing peekaboo with me ::)
When the air conditioning guy was looking through my scorp system last Summer, he was very through and he checked all the fuses and relays in the system...all where OK. What is confusing me is why does the AC come on at first and then go to ambient, very odd that. It would appear, perhaps that one component is a bit dodgy......but which one?
Cheers Ferret

Title: Re: a/c compressor fuse
Post by ferretmobile on Mar 31^st, 2007, 1:08pm

Oh, forgot also to say that I replaced the gizmo on the front of the condensor. Its a kind of round black thing like an asperin container...cant remember the name of the part but its a sealed unit with three electrical connections on the top.
Ferret