That is normal. Typically a unit doesn't maintain the exact Set point temp. If set for 75 it cools to 74 and doesn't restart until 76. Obviously if getting too much higher than that there is a problem. Units also are programmed with maximum and minimum run times as well as how many times it can cycle per hour. Hope this helps!
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We have had the temp set at 74, it was 80 and still didn't come back on until I powered it off and turned back on and then same thing, it would reach desired temp and not come back on
Yeah, that sounds like a problem. Should be fully covered under warranty, 2 weeks old. Could be a number of things, line voltage issue, bad board, bad tstat. Call the installer.
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SOURCE: ac turning on and off
How did they check the freon in the home? You can feel the front(evaporator coil)coil on all four sides. Are you sure the motor is running fast enough? If the four corners do not feel cold in about 5 minutes or so, there is a compressor problem, Capillary tube blockage, moisture in the system or you are low of freon. Good Luck
SOURCE: AC does not cool to the temp as desired
Does the thermostat have a mercury bulb in it, if it does you need to level the thermostat.
When you take the cover off, on the sub base there should be a couple of marks or grooves
One on each side of thermostat, you need to take a level and loosen the screws on the sub base
And with the level completely level align those two marks with the level.
If you don’t have a mercury bulb, then your thermostat may need the heat anticipator adjusted, some you can adjust the bi-metal coil, but I haven’t done that, so I couldn‘t tell you how to do it, or you just have a bad thermostat.
SOURCE: Compressor doesnt come on in a dometic duotherm
If this is a wall thermostat controlled unit, then check to make sure that you have power coming from the yellow wire on the thermostat when it is placed in the Cool/Auto High mode. If you do not have power at the yellow wire, then you have a bad thermostat. If you do have power, then remove the control unit from the inside of the AC and see if you have power at the Y terminal there. If so, when you turn the thermostat to cool, can you hear a relay clicking in the box? If not, then you have a bad control box. If the relay is clicking, you need to check the power at the compressor relay on the board. It has a black wire to one side and a purple (or blue) wire on the outgoing side. Check to see if you have 120V on the blue wire when the tstat is set to High/Cool. If not, then you need to bypass the freeze switch to make sure that is not the problem. If you do, then you need to go upstairs and check the start capacitor for OK. It is located in the side compartment of the upper unit, it has a small black relay on the top called a PTCR. These often burn out and will cause the compressor not to work. If that is fine, then you go to the top of the compressor to the thermal overload switch. See if you have power at both sides, if so, then you have a bad compressor. If not, then the overload switch is open and not allowing power to the compressor.
SOURCE: AC turn off before it reaches the desired temp
Hi there. I assume the indoor fan runs continuously until the house has cooled down. Clean the condenser. (outside unit)
Another possibility is that the system is getting low on freon. Check for leaks with soapy water at all joints and fix them.
Thanks
Paul
SOURCE: dometic a/c, duotherm thermostat, turns right back on after it reaches desired temperture.
I have a dometic 13500 BTU Roof mount a/c. It is set up with the duo-therm analog thermostat. The system cools fine. The problem is that the a/c gets down to the right temp, then it turns off like it should but turns right back on within a few seconds. Any help would be greatly appreciated.
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