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Re: rudd model ubhk-24jinfg
Check your filters inside the furnace, replace if needed. Then check to ensure that the fan is running inside the furnace. If these two things dont fix the problems, I would imagine you have low refrigerant issues. In that case you should call a service company.
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copper pipe freezing on the outside indicates that there is liquid evaporating in the space created by the suction of the compressor
the pipe normally will be insulated to stop atmospheric humidity condensing on the pipe
Suggest that you get in a technician to check gas pressures and ac operation
First turn off the breaker to the unit. Then disconnect the wires from the compressor making sure you right down which wire goes to which terminal. Using an ohmmeter place one lead on any copper pipe inside the unit. put the other lead on the terminals in the compressor one at a time. If you have continuity from any terminal then the compressor is shorted to ground. the other method is to record the readings across each terminals (run, start and common) the two lower readings should equal the higher reading. If not then the compressor is either internally shorted or open.
Check the defrost board in the outdoor unit... it should have a wire coming off pins that are stamped 30, 60, or 90. If the wire is on 90, then try setting it to 60 or 30. This just enables the defrost board to check the freezestat in minutes...the shorter amount of time, the less likely the unit will freeze up.
Take a moment to check the filter and be certain it is clean also check to be certain that the coil behind it is clean. You can deice it by using a hair dryer with the unit off it may be a bit messy but it the quickest way. Make ceratin that eh fresh air damper or outside air damper is closed or only open to a minimum position. close any rooms that are not in use. Then if it ices up again the things to check are the fan motor (indoor) it might be slowing down. Then its on to the amount of charge that the unit has. This of course will require a set of guages . You can search for leaks by looking for any signs of oil at any of the connections and or tubing leading to and from the compressor. If you spot oil then thats the area that is most likely leaking . It only needs to be a very slow leak. But it still a leak. You can take a bit of soapy wather and apply to the area and you MAY see bubble depending on the leak .. Ususally you do find it. If it is a leak be ceratin it is repaired before you recharge it again .. this willl of course require a service tech to complete the repair.. Hope this helps let me know Jon
Since you don't give a model number, I will have to assume that it is a window unit, if not this probably won't apply. When a unit freezes up - as in ice on the evaporator fins it is usually either a low freon condition or the fan is not moving air accross the unit.
With the supper high temps that we are experiencing, many units that are undersized for the area that it is trying to cool are having serious problems. One client called us out to respond to a similar problem, so we charged the unit to factory specs. A few days later she called and said that the unit wasn't cooling properly, so we went back out. Since it was a window unit that was in the bedroom, it was a small unit. She was leaving her bedroom door open with fans to draw the cold air out to the rest of the house, which the unit was not sized to do.
You are absolutely right! The copper pipes should have insulation them. When they don't and they get cold in hot weather, they sweat and then freeze. Tubular Foam Insulation is what you need. Most home centers carry it. Once you cut and install it, be sure to wrap it in a good quality Duct Tape.
YOu have the temp set to low.. they need to shut down every now and then to kinda deice. Check the filter as well . lose off rooms that are not in use during the day. But my guess is that it's set way to cold.. you will also have to shut it down for a hour or 2 and deice it.