No clues on the cause but as far as them not listening either they listen or go elsewhere!! They will listen to that am sure. Your paying so you get to speak!! seemples!!

 

I've had this on a car in the past, it was the fuse box under the bonnet. The terminals had burnt out and was common for the car at the time. Was very cheap to fix, but I could have been charged an arm and leg, which is what I thought it was going to cost in the beginning.

 

there is a problem with some of the A/C clutch relays in the under bonnet fusebox. it sticks on or off intermittantly. ive replaced a handfull up untill now but it seems to becoming quite a common problem. get it replaced with a new one from honda. it should just pull out but you may find it better to use a pair of plyers.

 

Thank's for the replies guys.

You know beefy that's what I'm hoping it is as the problem is/was intermittant but when working it's super chilled.

Tried to pull the relay out but the thing is stuck fast at the moment.

Can I just buy this part from Honda parts? or will they try and insist they fit it themselves?

 

just buy it and fit it. just make sure you explain what relay it is and that it is in the under bonnet fusebox.

 

Cheers for the help Beefy.

Picked up the relay this afternoon (£20 for a small cube about 1inch big!!!). Fitted the relay and viola... problem solved, freezing cold air again.

Top class advice :beer:

ps. Obviously fingers crossed for a few days whilst touching wood with the other hand, but as currently stands the compressor kicked in straight away the the air was cold and conditioned in seconds

 

I am having this problem at the moment and the only way i am finding can fix it without going to the dealer is to turn the a/c off and on until it starts working. I must take mine back to the dealer to get it sorted.

It happened to me whilst in Montenegro a couple of weeks ago and the temperature outside was in the high 30's and I wasn't impressed.

 

Opposite problem

After the last service, the car won't blow out warm air until the temperature gauge goes well above the middle and then drops again and the warm air comes through.

I've checked the coolant level and it is within the ranges.

Any ideas?

Charles

 

You're Great!

Thanks guys for posting such info in the spirit of others learning from your experiences.

My A/C was (very rarely but still irritating) giving me problems by sticking OFF (nothing out of the ordinary appears on screen - Honda CTDI 2009 EX model by the way). You'd well notice here with the hot weather however, that the A/C is not working. What was actually happening was that after quite a while, the RELAY 39794-SDA-A03 was heating up and sticking to OFF postion.

When cool, the car Climate control and A/C works perfectly again. And so the cycle repeats.

SOLUTION? Yes, as you guys said here - replacement of the OMRON/KYODEN ISO RELAY - OMRON MODEL NO is: G8HL-H71. It's a 12V - 20A (max) relay.

If you live on tiny rock like MALTA options are limited to one HONDA agent or else, I found a suitable cheap alternative at a local famous car-electric stores and got this one. (or some online store).

MRS1220 - NAGARES
Micro Relay 12V 4 pins 22A MAX (you can search for it online) Should cost around €5. Fits perfectly and fuse box closes well too.

Now I can switch on/off Climate control with no issues at all, hot or cold, any weather. If I had not checked over at this forum, I was already told that I might have a faulty A/C Clutch and/or has refilling and other needless crap.

Thanks to CIVINFO!

 

From where did you buy it ?

Thanks guys for posting such info in the spirit of others learning from your experiences.

My A/C was (very rarely but still irritating) giving me problems by sticking OFF (nothing out of the ordinary appears on screen - Honda CTDI 2009 EX model by the way). You'd well notice here with the hot weather however, that the A/C is not working. What was actually happening was that after quite a while, the RELAY 39794-SDA-A03 was heating up and sticking to OFF postion.

When cool, the car Climate control and A/C works perfectly again. And so the cycle repeats.

SOLUTION? Yes, as you guys said here - replacement of the OMRON/KYODEN ISO RELAY - OMRON MODEL NO is: G8HL-H71. It's a 12V - 20A (max) relay.

If you live on tiny rock like MALTA options are limited to one HONDA agent or else, I found a suitable cheap alternative at a local famous car-electric stores and got this one. (or some online store).

MRS1220 - NAGARES
Micro Relay 12V 4 pins 22A MAX (you can search for it online) Should cost around €5. Fits perfectly and fuse box closes well too.

Now I can switch on/off Climate control with no issues at all, hot or cold, any weather. If I had not checked over at this forum, I was already told that I might have a faulty A/C Clutch and/or has refilling and other needless crap.

Thanks to CIVINFO!

Hi,

Just wanted to ask you from where did you buy the relay.. since im from Malta i would like to buy it and replace it myself..

Thanks
Andrew

 

I'm having problems with my a/c, had a look at my relay but could not get the thing out!!

Did you have problems taking the relay out, really tried pulling it, but would not pop out!!

 

Yes - You do need a set of pliers (or some other grip tool) to gently get it out of the fuse box. It sticks hard.

Also - it turned out, in my case, that the problem was not the ISO RELAY - the problem, as my mechanic/electrician found out was related to the A/C CLUTCH itself!

When the car heats up with use (and ONLY when it heats up), the A/C will start blowing HOT air. The problem was (as we later found out) with the A/C clutch not gripping when hot - either because the coil weakens with heat (and ambient temperature can quite hot here) or it was a matter of clutch grip.

SOLUTION? Clutch dismantled and a spacer washer like thingy removed and the clutch re-assambled without it. This way the A/C clutch plates are closer together and when the coil activates, the clutch plates are well tight together so the auxilaury drive belt rotates the A/C without problems.

So there - I hope this information helps those having similar issues.

 

Yes - You do need a set of pliers (or some other grip tool) to gently get it out of the fuse box. It sticks hard.

Also - it turned out, in my case, that the problem was not the ISO RELAY - the problem, as my mechanic/electrician found out was related to the A/C CLUTCH itself!

When the car heats up with use (and ONLY when it heats up), the A/C will start blowing HOT air. The problem was (as we later found out) with the A/C clutch not gripping when hot - either because the coil weakens with heat (and ambient temperature can quite hot here) or it was a matter of clutch grip.

SOLUTION? Clutch dismantled and a spacer washer like thingy removed and the clutch re-assambled without it. This way the A/C clutch plates are closer together and when the coil activates, the clutch plates are well tight together so the auxilaury drive belt rotates the A/C without problems.

So there - I hope this information helps those having similar issues.

BLAIZE P
I am from malta as well and i'm having the same problem.I think it is the clutch that is not gripping when the engine compartment gets hot.Where did you go in malta to fix your clutch and was it hard to fix???

 

This is what im looking for, just another question guys what is the relay labelled as?

 

Original relay is called an OMRON, made in USA and the new one is labelled as Mitsuba made in Vietnam.

 

A/C now fixed finally !!

Have today got the A/C now working after replacing the compressor, regassing and then also replacing the relay.

Spent £100 on a used compressor from ebay, labour for fitting £60, £50 for a regas and £21 for the new relay.

Chilled air finally !!!

 

A/C Clutch issue

Picking up what Blaize_p posted earlier, I seem to have the same problem, The air would suddenly go from freezing cold to warm - so I didn't think it would be a gas problem as I thought that would degrade over time. However, having changed the relay and only getting 20mins of cold air before the cooling again stopped, I had it re-gassed anway. This made no difference at all.

I will have a look at the compressor clutch, but before I do, can anyone offer any tips on access to it and dismantling it? Diagrams, photos?

Many thanks

 

Picking up what Blaize_p posted earlier, I seem to have the same problem, The air would suddenly go from freezing cold to warm - so I didn't think it would be a gas problem as I thought that would degrade over time. However, having changed the relay and only getting 20mins of cold air before the cooling again stopped, I had it re-gassed anway. This made no difference at all.

I will have a look at the compressor clutch, but before I do, can anyone offer any tips on access to it and dismantling it? Diagrams, photos?

Many thanks

Check the supporters forum...

Can the clutch be replaced without buying the whole compressor?

Yes...

 

Can the clutch be replaced without buying the whole compressor?

 

Great news that there may be a solution but what should I be checking the supporters forum for?

Also, am I right in thinking the engine can still be run with the clutch removed from the middle of the compressor pulley?

Can it be extracted with the washer bottle in place?

 

Great news that there may be a solution but what should I be checking the supporters forum for?

Also, am I right in thinking the engine can still be run with the clutch removed from the middle of the compressor pulley?

Can it be extracted with the washer bottle in place?

Think you will have an issue running as if I recall correctly the compressor is driven by a common belt. Also the clutch maybe an issue to easily remove whilst in situ, that said others may have managed it?

 

Any updates on this one? I'm facing the same problem, aircon going out when it's very hot outside.

Everything is working fine when I start to drive, until it get's hot in the engine bay (hot weather, slow moving traffic...). Then the clutch won't engage the compressor any more.

Can I reach the airco clutch without disassembling the compressor?

 

The good news is that the removal of the spacer (which completely fixed the issue for me), does not require the hoses to be removed from the pump.

A little bit fiddly but probably no more than an hour from end to end.

 

How did you access the aircon clutch? Throughout the wheel arc or from below?

 

It was from below. Obviously the undertray has to be removed but IIRC not much else. I was worrying about stopping the pulley from rotating while removing the nut - but in the end it wasn't an issue.

 

Sorry for a "me to", but...

Really frustrating when of course we have the once a year heatwave in the UK and the bloody A/C packs in. The one thing I look forward to on a hot day is the A/C in the car.

It was fine driving leaving tonight to go out for something, but coming back the air seemed warm, not cool even set low. Couldn't hear the engine 'click' as the A/C kicks in. Tried turning it off and on a few times and fiddled with settings but no use. When I got home I turned the engine off, then turned it on again, tried a few times and turned A/C on and off also. Nothing.

Only hope is this is related to the hot and humid conditions which are likely brief and it will kick in again.

Edit: So to start, I need to be looking for a 39794-SDA-A05 Mitsuba part and try that. Think I've identified the relay in the fuse box, old Omron part. Anywhere that delivers one of these next day in the UK or can these be got from an motor factors place (from past experience with Honda dealers it can take a week or two to get parts)? It's baking hot at the moment!

 

Cox got me one in 2 days and I ordered it on Monday night and got it today (Wednesday). That is pretty much next day.

 

I'll give them a try. Not the cheapest. Loads of cheap stuff on ebay but from China etc and not sure I'd trust them. The Mitsuba one seems to be the one to get I take it (that's less likely to fail again).

Just an update - I have noticed on turning on the AC the engine revs do go up slightly, and down again when off. However I don't hear the distinctive 'click' which I assume is the clutch, and AC just blows hot air.

Engine rev change I guess is activated separate from the relay? (ecu?) If not though, then perhaps it's not the relay. I'll try it anyway.

ps tried getting the relay out and even with pliers it's not budging. Do I just gently rock it out or loads of force pull it out?

 

I rocked it to get it out. It wasn't coming out rocking side to side but lengthways it did.

 

Pull the relay, they often stick.

 

Well, got the relay, replaced, made no difference

Above talk of clutch and spacers are going to be beyond my skills, so guess I have to book the car in and shelve out a load. Just hope I don't get faffed around booking in and all they do is investigate and then say they have to order in parts, which means booking it in again.

 

have you had it regassed if the gas is low the compressor wont kick in....

 

Deni is right. I am sure I saw a video on YouTube refill gas. It's super easy.

Sent from my ONEPLUS A3003 using Tapatalk

 

Didn't realise it was that easy to do.

Even Halfords tell you how to do it DIY! :laugh2: (may give this a go as can just pop in to get the stuff rather than wait for an order from somewhere).

Help & Advice | Video - How to Recharge your Air Conditioning


Where do I find the correct pressure though? I assume it depends on the car? UK Civ 08 1.8 Petrol EX

Edit: Hmm, looking at the Halfords reviews, while generally good there are many warnings. Overall cost isn't much less than even Honda doing a recharge when you consider the connector cost as well. Stories of bottles not containing as much content as they should. Only really a quick top up solution and probably better to get it professionally done.

Plus advice against it here - http://www.civinfo.com/forum/bugs-faults-irritations/75415-diy-air-con-recharge.html

So, Honda Air Con Service is £65. That I would assume would be a full clean out, recharge and check for leaks?

Or I go for any other air con service people. Would like somewhere that can be done while I wait fairly quick, rather than book the car in (which means I need a courtesy car given distances to places and necessity for a car for the day).

 

let the professionals do it mate heard to many horror stories with diy ,overfilling our aircon systems can cause the engine to judder very bad and the car run rough , I wouldn't chance it it takes to fill up 465 grams and another 100 for the pipes, my advice let the pros do it...

 

+1 to this, any good AC specialist will be able to resolve any issues in a jiffy and not break anything either.

What's the old adage...buy cheap, buy twice.

 

Just got myself a used compressor to hopefully finally sort mine out. Had the relay done and the regas which showed no leaks, but the pump won't kick in. Mechanic reckons it's seized solid?!


What's the rough time to swap it over? about an hr? It's an AC place so they'll remove and replace the new gas that's in there, just want to know so they don't overcharge.