Question about 2005 Honda Civic

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Charging an empty freon system and clutch wont engage for recharge

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I saw a post elsewhere to hold the can upside down and put some liquid refrigerant in the system when way low. Unless you have a serious leak I'd think that you could add to the high end of normal pressure, let things sit a while and check / add again to get it to the point that the low pressure switch will turn off. YMMV.

Posted on Jul 31, 2010

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You cant just charge it. it needs to be evacuated with a vac pump. The clutch will not engage until it has enough pressure.

Posted on Jul 24, 2010

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1 Answer

AC compressor clutch wont engage


Compressor will not run if freon charge low. If you want it to run supply direct power and ground to back of compressor. I do not recommend a home recharge as you will not be able to evacuate the moisture in the system and inject adequate amounts of oil

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Why wont a/c clutch stay engaged


You dont have enough refrigerant in it. Go to wal-mart and by a recharge hose and a can of freon, If you do not have any leaks, and system is ok. Then by adding the proper amount of freon, should keep the a/c clutch from recycling. Good-Day! It will tell the proper way to fill it on the guage for the freon.

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Was it recharged last year because it was low? If so, a leak is probably present. An ultraviolet dye should have been installed when it was recharged. A black light can be used to see if any leaks are present if dye was installed. Either way, the freon pressures need to be checked as a starting point. If there isn't enough freon in the system, it will not come on.

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My 2002 neon's A/C blows warm air. The vent pressure is working well- but it blows warmer than the outside air. Can I fix this myself? What might the problem be?


If you are handy, yes you can. Most likely causes are loss of freon which would prevent the compressor clutch from being engaged and operating the compressor, a lack of 12 volts being applied to the compressor clutch because the a/c compressor fuse or relay has failed, preventing the clutch from engaging the compressor, or the compressor clutch itself failing. Easy test is to watch the compressor pulley with the motor running. The pulley will, of course be spinning, but the circular assembly mounted to the front of the pulley will spin with the pulley only when the compressor is engaged. There is a sensor mounted to the a/c line that prevents the clutch from engaging the compressor if there in not enough freon in the system. You could go to auto zone or checker and buy a can of freon r-134 with a hose for around $15.00. It is fairly easy to follow the instructions to charge the system. If, after allowing some of the can to pressurize the system, the compressor clutch engages then you can continue to charge the system. Cold air should start to blow by the time the can is empty. Or you can locate the a/c relay located in the fuse panel, remove its plastic cover and manually close the contacts while observing the compressor pulley assembly. If the clutch doesn't engage then the problem in probably electrical, a fuse, the relay or the electric clutch itself. Go to auto zone and check you their dvd on a/c repair for under $9.00. Hope this helps! Dano

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2 Answers

Cant get it to take a air conditioning charge . I used the 134a kit described in the manual car warmed up air conditioner on high and it wont take the charge


Hi, on the front of the compressor you will have a plate which is your clutch, you can find it by using the manual. Its a metal plate that's mounted right on the front face of the compressor pulley. With the engine off and you hook the hose and gauge to the low side, if you have freon in the auto at all it will show pressure, with motor off. When you start the auto and turn the a/c on, you will hear the plate/clutch click as it engages and the compressor will start pumping, pulling the freon into the port. If the clutch is not working, it will not pull freon into the a/c. Have a helper with you and you can have them turn it on and you watch and listen.If the auto is low, the clutch will go on and off, on and off while you add freon. You will know the sound it makes when you hear it. Make sure the can is pierced to let the gas out, but if the auto wont take it, more than likely the compressor clutch isn't working, so it will not pull freon from the can. It has to draw it out. Check for the a/c fuse under hood in a electrical box or under the dash. It will tell you in the manual where it is located. If the system was empty, you will have air in it and it will need to have a vac. pump put on it to remove the air and moisture. If you had any pressure at all, you will be OK. Try and check the things I have said with a helper and make sure the clutch engages, and it should pull it right in. It will hold about 2- 12 oz. cans when empty. Please let me know the out come on this, keep me posted. Also, be kind when rating as I know you will. I will be here if you need more help.
Shastalaker7
A/C, Heating, & Refrigeration Contractor

Jul 18, 2010 | 1995 Mitsubishi Galant

1 Answer

Clutch on pump not engageing .no voltage to


If it's the A/C compressor you are looking at then the system is probably too low on freon to work and the control system isn't allowing any voltage to the compressor circuit because of this problem. If the compressor was allowed to run while the system was low on freon it would cause severe damage to the compressor which then can contaminate the remainder of the system. I would suggest having a service facility hook up to the a/c system and checking the state of charge. If' it's low or empty then the leak would need to be found and repaired to restore the a/c to normal operation. You could have an electrical problem somewhere but I would say that odds are it is too low on freon to work.

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2 Answers

When i turn on ac it blows hot air


Normally due to low freon. Also, notice if the a/c compressor clutch engages, as it will not if the freon is low.

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3 Answers

A/c turns on and off fast, cools when running but wont stay on.


All the symptoms of your AC system needing a recharge. When the AC system is low on refrigerant, the compressor will constantly turn on and off as it requires at least 15psi of refrigerant to engage. Have your system recharged to solve your problem.

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2 Answers

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Change your compressor it has got damaged.

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