I have 3 rheem ACs. They all have a switch/button on their outside units that are locked down when outside fan is running. However, on one unit, this switch/button is not going down. I have decovered this by removing the covers to the other 2 and watching what takes place on the 2 that work (fan turns when unit turned on). When holding down this button the 3rd units works. Hence, I have resorted to placing a small rock on the button, cooling the house for 2 hours and removing the rock. (Getting Old) Thanks so much for your help with this matter. Kathleen
Very impressive!! This button you are referring to is a contactor. When your tstat calls for cooling it sends 24 volts out to the contactor therefore pulling the contactor in completing the circuit for the fan and compressor. Usually this doesn't work when a safety switch is preventing the 24 from getting to the contactor. Either it's not getting a signal from the tstat or one of your safeties are tripping (high or low pressure) or the float switch on your drain line at the air handler is wired in to only stop the condenser from working rather than the tstat. A multimeter would be extremely helpful for you to determine where the voltage is stopping. Check your drain first, I don't suggest your patented rock idea, it's not running because of a safety. Good Luck , let me know!!
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SOURCE: My unit is running but not cooling
Hi, Probably not an easy fix. Sounds like its shutting down on Low pressure or High pressure. Could be condenser fan motor. The easiest thing it could be would be a run capacitor on the fan motor. They usually swell up and or leak oil when they go bad. You could check on that but make sure all the power to the unit is shut off before working on it. I would just call the manager or owner myself if I were you. I'm sure he is charging enough rent for him to cover such problems. Hope I have helped. kstfas
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.
SOURCE: The outside unit on our Ruud heat pump won't turn
first look for red button neer the copper line set if has one push it second inspect thermostat wires for weed eater damage check disconnect for fuses check breaker at main panel pull disconect and remove cover check stat wire connections look at the capacitor if swelled up on top bad if all look ok put disconect in using insulated object manually push in contactor if unit comes on check for 24 volt ac on yellow stat wire to common if none stat wire could be loose at indoor unit or stat bad hope this helps you
SOURCE: ruud UAKB-018JAZ outside condensing unit will not run
Trace the wires (small cable) going to the out door unit. This is your 24v control circuit. when it enters the outdoor unit it ties to wires routing through the inside of the unit trace these down. For AC units 1 usually goes directly to the "contactor" (the item you push in and the unit runs?) the other wire can also go to the other side of this same item. But I suspect it goes through other tings before it finally gets there.
Some items are the high and low pressure switches and a delay timer.
A red button sticking out where you can reset it is the high pressure switch and if it clicks and lets it come on you may have a dirty outdoor coil or a fan motor outdoor that is not operating all time.
A low pressure switch has no reset normally on AC or HP.
A delay timer will have 2 3 or 4 wires depending on the type of timer. 1 of these wires goes to the contactor (usually) and one of them feed this wire. remove the wire going to the contactor. now 1 at a time take the other timer wires and touch them to the wire just removed. if the times is bad the contactor will click when you touch one of them with the removed wire.
If its a heat pump you will have to make the contactor try to come on around the board. and this you will need some knowledge on which and what feeds your contactor. Here Id suggest a technician. If I had a way to see your setup and wiring I could talk you through this but its too hard to type and would take way too long.
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