My Carrier Split System Air Con, was working fine last summer but this time when I tried to switch it on it only blows hot air inside and the outside unit blows very cold air outside. It look as if the process has reversed itself. Could you help me with an indication as to what is wrong. It was never used during winter (heating). Thanks
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Lift the front cover of the air con, on the right hand side there is a button or a hole which has a button inside which you can press which is for manual starting of the air con. If this works, then you will know the remote is faulty, if it still doesn't work, check that the isolator switch for the air con hasn't been turned off. There will be 9Or should be) a switch outside next to the air con outdoor unit to switch power on / off to the air con. If not, there should be switch inside the meter box at the front of the house. Make sure they are switched on.
Due to the many different questions I see about Air Conditioning, I am including this overview to help us better understand each other for trouble shooting. A basic air conditioning system has a Thermostat, Air Handler or Furnace Fan and a Condensing unit. In a split system, the condensing unit (Condenser) is separate from the furnace and usually in the back yard. When working properly, it blows hot air. It connects to the cooling part of the system by 2 copper lines. One large line and 1 small line. The part that cools the house is the "Evaporator" and is usually on top of the furnace inside the square metal box (Plenum). When the Air Conditioner is running, the large copper line should be cold and the smaller line should be warm. Common signs of low refrigerant are that both lines are the same temperature and/or frost or ice has built up on the large line at the condenser. The thermostat will normally display room temperature on till it is touched to change the setting. It could have a "Span" setting as well as times and temperatures. The operating "span" of MOST residential thermostats is 40 to 90 degrees. That means you can set it as low as 40 degrees and no higher than 90 degrees. It probably has a fan switch also. When in the "ON" position, the fan will run constantly, 24 / 7, but the condenser will still cycle on and off as needed to keep the house at set point. If you have a suggestion to include in this paragraph, please let me know.
I think I have it covered above. Let me know if you need something more specific. Thank you. Roger
what kind of air con is it. it would be a sticky reversing valve either from inside the valve or the solinoid pulling it siting on the valve. http://t3.gstatic.com/images?q=tbn:SMSfcwrA_p4i6M:http://www.daviddarling.info/images/reversing_valve.jpg&t=1
ok depending on what part of the world your in and the season .
Winter: most split systems are designed around a set given temperature of operation , if this is a heating problem the what you are experiencing is the system going into deforest . bare in mind that those carrier splits are manufactured in china and are designed for about 35 deg C in summer and +5 in winter , anything out of this temp range will cause this , especially if it is running on freon 22 , in-which case it sounds like its short of gas to me . if its a new R410 a system , then check your filters and if they are clean and its still doing the same then it too is short , in each case a refrigeration mechanic is required.
You'll most likely find your Air mix shaft has snapped - very common in the BA's and Territorys. Part only costs roughly $40, however the whole dash needs to come out so you can insert the new shaft. Less commonly it could be the HIM box