Question about Ruud UAMB042 Air Conditioner
I have come home a couple of time and my A/C unit is on and running but blowing hot air. I went outside to check the compressor and the fan on that unit was not spinning. I saw a switch on the bottom of the unit that said High pressure control push to reset, I did that and the unit started running again and cooling but it has happen twice in the last week is there some major going wrong with this unit? it is only 5yr old.
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Posted on Jan 02, 2017
SOURCE: High Pressure Shut Down
Hi, If the outside fan is running when this takes place and the condenser is clean, I believe its the High Pressure Control that is bad. There is a possibility that if the unit was opened and air was allowed to get into the refrigerant part on the system that it could cause this problem but unless the system was worked on just prior to this starting, I don't think this would be the case. The part about draining the freon to check the orifice doesn't sound right, This could be done with a pump down by closing the suction line valve at the condensing unit which leaves the freon in the condensing unit. If they charged you to replace the freon, I would question them about this procedure. Hope I have helped. kstfas
Posted on Sep 10, 2007
SOURCE: cooling problems
Inside coil could be undersized. Have a tech check inside coil rating. Sometimes people only change out what they perceive to be bad. Its best to change inside coil nad condenser at the same time
Posted on Jun 23, 2008
SOURCE: Daily reset of outside unit
I have the same unit and was having the same problem. My brother works on A/C's and told me that the coils most likely needed cleaning from the inside out because when they are clogged with a lot of debris the system will overheat and cause that switch to trip and so far it has worked. What you need to do is turn the main breaker off to the outside unit first then take the four screws out of the top of the unit, use a flat head screwdriver and lift the fan it's self up out of the carefully taking caution of the wires going to the fan, then take the garden hose with a spray nozzle and wash the coils from the inside spraying through the coil to the outside and then wash the louvers off of all the debris and this should help.
Posted on Aug 03, 2008
if the button your pushing is in the unit outside it is a manual reset for high head pressure this cuts off the unit to protect the compressor,you need to clean the coil .turn the unit off and gently push water through the coil in an up and down motion till water comes out clean see if that helps
Posted on Jun 26, 2009
If it does not have a furnace or heating elements for heating, then it is a heat pump, which is rare for a central AC system, but makes sense of the fact that it blows warm air when you reset the pressure switch, which may indicates freon pressure charge problem if your AC system has a reverse valve and uses freon to for heating (heat Pump).
Do you get heating when outside unit runs? if you do, check freon pressure levels and top up to required pressures. The button you depress is a pressure reset switch ... that is if your AC system is a heat pump ... which, as pointed above, it is not common for central ACs.
Posted on Nov 07, 2009
Testimonial: "Thank you. My home warranty tech is coming out monday and i want to make sure he checks everything. this will be the 2nd time he has been out."
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