AC/Heater updated air-con compressor relay to prevent failure - Page 2

Booboo · 11th July 2012, 06:34

You think it will or know it will? Wow I hope so for £2.26! Wonder if you sent them a message with the part number off the Honda one (39794-SDA-A05)they could check it?
Here is the spec for the standard rely http://downloads.components.omron.eu...K911-E2-01.pdf

Ron240 · 11th July 2012, 16:05

Well i received the relay today and have just fitted it, but unfortunately it made no difference, and my compressor is still not coming on.

It was definitely worth a try though.
As i said before, there is visible damage to my condenser, so i think its virtually guaranteed that my particular problem will cost in the hundreds to fix properly.
Weighing up the cost against the relative infrequency that i use the air con(at least for refrigerated air), together with how much longer i am likely to keep the car.....then it is just not worth getting it fixed.

I am actually quite disappointed with Honda, because i dont think major parts of the air con system should be failing at just over 4 years old.
My previous car was a 5 year old Ford Focus, then before that a 4 year old Volvo S40, both of which had perfectly functioning air con that had never required any maintenance at time of trade in.

On a happier note, the BTCC shirt that i ordered from the same seller is excellent.

abs-civic · 11th July 2012, 19:51

Hmmm sounds like a similar problem I have, changed my relay with no luck. Cannot hear the compressor coming on. Maybe give it to a local garage to inspect it or see if there is any fault codes.

Also disappointed with Honda, as my previous car a 2003 bmw, had perfect cold working aircon.

Booboo · 12th July 2012, 08:10

Any one want to sell their 39794-SDA-A05 relay?

abs-civic · 13th July 2012, 01:22

Quote:

Originally Posted by Booboo

Any one want to sell their 39794-SDA-A05 relay?

Sorry I returned mine to Honda and got a refund.

Booboo · 13th July 2012, 11:21

I've been looking around and found this
12V 25A relay | Make and break relay with diode | 12V micro relay

& this will do the job

Ron240 · 13th July 2012, 11:21

Quote:

Originally Posted by Booboo

Any one want to sell their 39794-SDA-A05 relay?

Ive decided just to keep mine in.
I know i said i have no plans to pursue the problem further, but who knows what the future may bring....at least the updated part is fitted now.
Sorry.

I would just go and order one off ebay if i was you mate.
If it works, great.....but if not it was only 21 quid.
I personally wouldnt be comfortable with fitting a cheap non approved electrical component in the fuse box of my car.

Laney · 13th July 2012, 11:30

Booboo · 13th July 2012, 11:34

The only thing that makes it 'approved' is Hondas own part number. The unit hasn't been made by them, they just brand it as their own to make it hard to source 'non-Honda' replacement parts for a quarter of their price.

EDIT:- I've just ordered one and a pack of micro fuses, as delivery is free over £6.

hondacivicnut · 13th July 2012, 20:51

Some of you guys with AC not working problems, if there is no sign of refrigerant leakage on the AC system, no blown fuse or faulty relay, then try removing the battery earth lead for ten mins. This would 'reset' the ecu.

Ron240 · 14th July 2012, 00:29

Quote:

Originally Posted by hondacivicnut

try removing the battery earth lead for ten mins. This would 'reset' the ecu.

Is there any way that doing this this could cure the problem?

hondacivicnut · 14th July 2012, 11:51

Try it, it's free

Ron240 · 14th July 2012, 13:34

Quote:

Originally Posted by hondacivicnut

Try it, it's free

Im trying to understand if you have any specific reason to know, or at least suspect that resetting the ECU by disconnecting the battery could have a positive effect on the air con not working?
Can you give me an idea how this might work please?

J. Derek Riddell · 14th July 2012, 15:17

Quote:

Originally Posted by Ron240

I'm trying to understand if you have any specific reason to know, or at least suspect that resetting the ECU by disconnecting the battery could have a positive effect on the air con not working? Can you give me an idea how this might work please?

It's like re-booting a PC that is 'hanging' - totally de-powering the ECU, will ensure that any screwed up code instructions get wiped, and on reconnection the factory settings come back (no effect on 'firmware', like remapping) ...

And 10 minutes may not be enough, in fact Honda recommend 1 hour ...

Further to all that, have you checked the fuse for the A\C ? - a shorted out relay could have blown the fuse ...

jamie_c69 · 14th July 2012, 19:12

Hi all
I have had a look at my relay and it says
OMRON
G8HL-H71
12VDC 120OHM
MADE IN U.S.A.
1426A12 M

Is this the relay that has the reliability issues, as the other in this thread has chinese writing on it but my one does not?

Cheers

Ron240 · 14th July 2012, 20:18

Quote:

Originally Posted by J. Derek Riddell

have you checked the fuse for the A\C ? - a shorted out relay could have blown the fuse ...

Thats an idea, and i would do that if i knew which fuse it was.

The handbook does not indicate(or at least does not make clear)any fuse related to the air con, in either the under bonnet or interior fuse boxes.
In fact the air con relay is not even mentioned. I only knew which one it was by the photo in this thread.
Can you(or anybody) tell me which number fuse and where it is located please?

Ron240 · 14th July 2012, 20:20

Quote:

Originally Posted by jamie_c69

Hi all
I have had a look at my relay and it says
OMRON
Is this the relay that has the reliability issues

Yes it is.
The Mitsuba relay is the updated one.
Refer back to post 1 in this thread for details.

J. Derek Riddell · 14th July 2012, 20:30

Quote:

Originally Posted by Ron240

Thats an idea, and i would do that if i knew which fuse it was.

The handbook does not indicate(or at least does not make clear)any fuse related to the air con, in either the under bonnet or interior fuse boxes.
In fact the air con relay is not even mentioned. I only knew which one it was by the photo in this thread. Can you(or anybody) tell me which number fuse and where it is located please?

I think the fuse and relay allocation is in the Wiki

p64 · 15th July 2012, 16:02

If it is not the relay that's faulty, then there is a great chance that the field coil is.

Mine failed after 6 years and 210k km, got it replaced and it seems that it failed only after 30 minutes of usage. Strange.

Andrej

hondacivicnut · 15th July 2012, 19:09

Quote:

Originally Posted by Ron240

Im trying to understand if you have any specific reason to know, or at least suspect that resetting the ECU by disconnecting the battery could have a positive effect on the air con not working?
Can you give me an idea how this might work please?

That's why I said it would reset the ecu. If as said above, leave it off for an hour, go with that. My useless Honda dealer who I bought my car off had it for TWO weeks before they found the fault with my AC. In the end, they fitted a donor ECU and the AC worked, then they refitted the OLD ECU and it worked, nothing else was changed.

I also mentioned above to check the AC fuse which I'm pretty sure I saw it in the engine bay fuse box. Some simple diagnostics can save you £££'s

If you haven't got a workshop manual for your car, get one.

11th July 2012, 06:34	#21 (permalink)
Booboo Supporter Car: 2007 FN2 Type R GT DMB Join Date: 12th September 2011 Location: Burton-on-Trent, UK Posts: 794 Thanks given: 57 Thanked 88 Times in 79 Posts iTrader: (1)	You think it will or know it will? Wow I hope so for £2.26! Wonder if you sent them a message with the part number off the Honda one (39794-SDA-A05)they could check it? Here is the spec for the standard rely http://downloads.components.omron.eu...K911-E2-01.pdf Last edited by Booboo; 11th July 2012 at 07:14.

13th July 2012, 11:34	#29 (permalink)
Booboo Supporter Car: 2007 FN2 Type R GT DMB Join Date: 12th September 2011 Location: Burton-on-Trent, UK Posts: 794 Thanks given: 57 Thanked 88 Times in 79 Posts iTrader: (1)	The only thing that makes it 'approved' is Hondas own part number. The unit hasn't been made by them, they just brand it as their own to make it hard to source 'non-Honda' replacement parts for a quarter of their price. EDIT:- I've just ordered one and a pack of micro fuses, as delivery is free over £6. Last edited by Booboo; 13th July 2012 at 12:36.

LinkBacks (?) LinkBack to this Thread: http://www.civinfo.com/forum/bugs-faults-irritations/73473-updated-air-con-compressor-relay-prevent-failure.html
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11th July 2012, 16:05	#22 (permalink)
Ron240 The Ronda Car: 2008 1.4 SE+ Vivid Blue Join Date: 20th October 2010 Location: Fife(not a native) Posts: 1,214 Thanks given: 62 Thanked 102 Times in 98 Posts iTrader: (2)	Well i received the relay today and have just fitted it, but unfortunately it made no difference, and my compressor is still not coming on. It was definitely worth a try though. As i said before, there is visible damage to my condenser, so i think its virtually guaranteed that my particular problem will cost in the hundreds to fix properly. Weighing up the cost against the relative infrequency that i use the air con(at least for refrigerated air), together with how much longer i am likely to keep the car.....then it is just not worth getting it fixed. I am actually quite disappointed with Honda, because i dont think major parts of the air con system should be failing at just over 4 years old. My previous car was a 5 year old Ford Focus, then before that a 4 year old Volvo S40, both of which had perfectly functioning air con that had never required any maintenance at time of trade in. On a happier note, the BTCC shirt that i ordered from the same seller is excellent.

11th July 2012, 19:51	#23 (permalink)
abs-civic Supporter Car: 2006 2.2 EX, NHB Join Date: 8th November 2011 Location: Bedfordshire UK Posts: 1,187 Thanks given: 89 Thanked 117 Times in 115 Posts iTrader: (5)	Hmmm sounds like a similar problem I have, changed my relay with no luck. Cannot hear the compressor coming on. Maybe give it to a local garage to inspect it or see if there is any fault codes. Also disappointed with Honda, as my previous car a 2003 bmw, had perfect cold working aircon.

12th July 2012, 08:10	#24 (permalink)
Booboo Supporter Car: 2007 FN2 Type R GT DMB Join Date: 12th September 2011 Location: Burton-on-Trent, UK Posts: 794 Thanks given: 57 Thanked 88 Times in 79 Posts iTrader: (1)	Any one want to sell their 39794-SDA-A05 relay?

13th July 2012, 11:21	#26 (permalink)
Booboo Supporter Car: 2007 FN2 Type R GT DMB Join Date: 12th September 2011 Location: Burton-on-Trent, UK Posts: 794 Thanks given: 57 Thanked 88 Times in 79 Posts iTrader: (1)	I've been looking around and found this 12V 25A relay \| Make and break relay with diode \| 12V micro relay & this will do the job

13th July 2012, 11:30	#28 (permalink)
Laney 無限 Unlimited Car: 59 Mugenised CTR Join Date: 14th April 2010 Location: London..ish Posts: 2,895 Thanks given: 260 Thanked 389 Times in 364 Posts iTrader: (5)

13th July 2012, 20:51	#30 (permalink)
hondacivicnut Join Date: 10th April 2011 Location: Yorkshire, UK Posts: 797 Thanks given: 32 Thanked 72 Times in 59 Posts iTrader: (0)	Some of you guys with AC not working problems, if there is no sign of refrigerant leakage on the AC system, no blown fuse or faulty relay, then try removing the battery earth lead for ten mins. This would 'reset' the ecu.

14th July 2012, 11:51	#32 (permalink)
hondacivicnut Join Date: 10th April 2011 Location: Yorkshire, UK Posts: 797 Thanks given: 32 Thanked 72 Times in 59 Posts iTrader: (0)	Try it, it's free

14th July 2012, 19:12	#35 (permalink)
jamie_c69 Car: Civic Join Date: 3rd November 2008 Location: England Posts: 232 Thanks given: 22 Thanked 21 Times in 18 Posts iTrader: (0)	Hi all I have had a look at my relay and it says OMRON G8HL-H71 12VDC 120OHM MADE IN U.S.A. 1426A12 M Is this the relay that has the reliability issues, as the other in this thread has chinese writing on it but my one does not? Cheers

15th July 2012, 16:02	#39 (permalink)
p64 Ezermester Join Date: 3rd July 2007 Location: MS Posts: 146 Thanks given: 0 Thanked 10 Times in 9 Posts iTrader: (0)	If it is not the relay that's faulty, then there is a great chance that the field coil is. Mine failed after 6 years and 210k km, got it replaced and it seems that it failed only after 30 minutes of usage. Strange. Andrej