Author Topic: AC packed up again  (Read 2518 times)

VicW

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Re: AC packed up again
« Reply #15 on: August 29, 2021, 10:45:25 AM »
I nearly booked the car in for repair at a Honda dealer until I was told that there was £114 diagnostic charge plus the cost of repair. I had told them what it was doing or not doing compared to normal, what do they want me to do go there and make my own coffee?

Vic.

richardfrost

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Re: AC packed up again
« Reply #16 on: August 29, 2021, 11:04:18 AM »
Maybe find a local Air-Con specialist Vic? Honda air con repairs will be overkill and overpriced, based on my experience.

MartinJG

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Re: AC packed up again
« Reply #17 on: August 29, 2021, 11:51:42 AM »
Vic, you have my sympathies. I faced this spectre myself a year or so ago. My solution, it seems, at least for now, was simply to leave it on full time to lubricate the seals. In your case, it does seem to be pressure related. Unfortunately, as we know, anything air con gets expensive which is why most people just let it go and do without. I would trawl through as many You Tube vids/internet threads and try and narrow down the potential source of the problem if possible. I am sure I saw a Scotty Kilmer air con video where the regulator was the problem. If it turns out to be a relatively easy/common sense fix then all well and good but I personally would not spend too much on it for obvious reasons. If you need air con, it makes more sense to sell the existing Jazz and buy a younger model, if possible. Not an ideal scenario I know, but the old adage of 'throwing good money after bad' springs to mind.
« Last Edit: August 29, 2021, 11:53:41 AM by MartinJG »

Jocko

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Re: AC packed up again
« Reply #18 on: August 29, 2021, 04:01:23 PM »
As suggested earlier, take it to an aircon specialist. These guys know their stuff. Over the years I have used auto electricians, and transmission specialists and they have saved me time and money.

MartinJG

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Re: AC packed up again
« Reply #19 on: August 30, 2021, 10:18:58 AM »

This is the Scotty Kilmer You Tube video I had in mind.


culzean

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Re: AC packed up again
« Reply #20 on: August 30, 2021, 10:43:21 AM »

This is the Scotty Kilmer You Tube video I had in mind.


He never mentions about how to check and replace / lubricate the seals in double hose flange he unscrewed from under the bonnet... surely that is a possible leak point.
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

MartinJG

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Re: AC packed up again
« Reply #21 on: August 30, 2021, 12:49:28 PM »
He never mentions a lot of things, but let's face it, he is really all about 'show business' albeit by another name. That said, I find his stuff interesting because Honda often features in his shows.

sparky Paul

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Re: AC packed up again
« Reply #22 on: August 30, 2021, 06:03:38 PM »
Ideally, you need a decent diagnotic tool (preferably Honda HDS) on the system to see what blocking the compressor running, the Jazz has a number of pressure/temperature sensors which determine whether the compressor runs or not. If it is the pressure switch, it's more than likely a gassing issue, and as Jocko's says, an aircon specialist is the way to go.

FWIW, in answer to an earlier query, the dual pressure switch is on the high pressure line from condenser to expansion valve/evaporator, near to the condenser, usual spot.

See below, item 9

...


culzean

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Re: AC packed up again
« Reply #23 on: August 30, 2021, 07:07:28 PM »
I had the clutch solenoid coil fail on Civic, which stopped the compressor running,  and found there is also a high-temp cut-out mounted directly on compressor body,  it is wired between the coil and earth on condensor - it is a bi-metallic type and will self-reset when cools down, it is there to protect compressor if it gets hot.

You can check the integrity of the coil and cut-out circuit from one of the large flat sockets that the clutch aircon relay plugs into ( as Vic found them mounted in their own plastic container just below windscreen washer fluid filler neck ),  the two small pins of the relay are the actual relay coil, and one of the large relay sockets should be connected to +12v via a fuse all the time ( that is the reason a stuck aircon relay can drain battery, the power is not supplied via ignition key circuit ) the other large socket will go down to the clutch coil and then via temperature cut-out to earth,  you should get a reading of about 4 ohms to earth if coil and cut-out wiring healthy,  if you do not get 12vdc on other large relay socket the fuse is blown. 
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

VicW

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Re: AC packed up again
« Reply #24 on: August 31, 2021, 03:27:08 PM »
Thanks for all the replies.
I have an update to the problem having had time to examine the problem more thoroughly. The aircon appears to work OK in that the incoming air gets cold, the temperature will go down to 4C but the condenser fan does not switch off during the three or four minutes I was prepared to sit there and listen to, it used to cycle every eight to ten seconds. I don't know if the fan is continuously rated or whether the compressor is also running all the time. Right now aircon isn't needed, it is bloody cold here in Lincs.

Vic.

culzean

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Re: AC packed up again
« Reply #25 on: August 31, 2021, 06:04:27 PM »
Thanks for all the replies.
I have an update to the problem having had time to examine the problem more thoroughly. The aircon appears to work OK in that the incoming air gets cold, the temperature will go down to 4C but the condenser fan does not switch off during the three or four minutes I was prepared to sit there and listen to, it used to cycle every eight to ten seconds. I don't know if the fan is continuously rated or whether the compressor is also running all the time. Right now aircon isn't needed, it is bloody cold here in Lincs.

Vic.

As far as I know the temperature sensor on the evaporator controls whether the fan and clutch cut out.  The Honda scroll compressor is a fixed displacement and when the evaporator is in danger of freezing up the sensor it there to tell the ECU to drop the compressor and fans off via the relays ( a small current signal from ECU, maybe 20milliamps  can control the relay coil which can switch a much larger current say up to 40 amps via the  relay contacts ).  If the evaporator is not in danger of freezing up then there is actually no need to drop fan and compressor.  On our Civic the fan does not cycle like the fan on our Jazz,  or at least not on a regular basis. 
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

E27006

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Re: AC packed up again
« Reply #26 on: August 31, 2021, 07:25:42 PM »
If the air from the A/C extremely cold?,  I has an A/C fault on a Honda Insight  the A/C ran forever,  the air was so cold from the vents near the steering wheel, the back of my hands  turned blue.
The problem was found,  a frost sensor connector had unplugged itself   from the A/C unit in the  dashboard.

There may be a self-diagnostic mode you can try,  you press buttons on the A/C control panel in a sequence, the A/C unit runs self-test and reports on the results on the A/C control panel display,  does anyone have the  Honda Workshop  manual to check for the existence of a self-diagnostic?

sparky Paul

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Re: AC packed up again
« Reply #27 on: August 31, 2021, 09:14:39 PM »
does anyone have the  Honda Workshop  manual to check for the existence of a self-diagnostic?

Honda Jazz 2009-2015 workshop manual A/C troubleshooting

http://hondafitjazz.com/manual3/en/html_en/index87.html

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