Beeping, random/constant changing of settings without touching
My ac runs great until randomly it will change back and forth from Auto, High, and Low. The beeping will slow down, speed up, just seems crazy. And very annoying. It seems as it wastes energy too from having to speed up and slow down. Very screwy.
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Bad fan motor. Multi-speed motors have a set of windings for each speed. Your high speed is bad so the only solution is to replace the complete motor. When motors are going bad they will over heat and kick out on the heat safety. As it cools back down it will start again for a short time again until it gets hot again.
how long a power cord do you have and what size conductors are in it. when a a/c shuts down do to thermostat reaching its setting then trys to start back up shortly the pressures dont have time to equalize resulting in high amp draw. if fans runs all the time instead of shutting off with compresser it will call for cooling fast. i have a 2003 cardinal with 2 a/c's the smaller one has a continous fan & the larger one cycles fan with compressor. i have power cord rated for 50 amps. 110 to 115 is still a low vooltage condition.
If you have both heat and ac running that means that the Yellow , AC and the White heat circuits are both being energized with the Red 24 volt hot leg that enters the tstat on the R terminal, note the Auto fan switch between Yellow and Green if Normally closed that is the Auto setting and high speed fan comes on for the Cool mode via the fan relay, while the Heat speed is low speed and controlled not by the fan relay but the temperature or time delay, you need to determine what speed you have running now, low or high? if you flip the fan switch to ON and it speeds up then it was on low, if it makes no difference you have high sped running already.
The thermo stat its self no good if this is a house issue. Had the same problem. Went to lowes and got a new one. The old one pulls out and the new goes in its place. No wire touching. If u can find a close match. If its a car a/c good luck never even seen a auto feature in a car. Only high med low.
Check t-stat and make sure fan is set to "Auto", that might be why fan is running all the time, or it could be a fan relay that is stuck closed. It sounds like you A/C is over charged or you have a bad high pressure switch, this was a common problem with this manufacture especially in the heat mode.
The blower has absolutely nothing to do with outdoor air. Having the T-Stat set to auto lets the blower come on only when the A/C-heat comes on. With the switch in the ON position the blower simply runs all of the time. Depending on your living space (high ceilings, multi-level) having the blower on constantly while costing a small amount to run can actually save some money and make you more comfortable in the summer. However most people will leave it in auto in the winter so they don't feel as if they have a draft from the air movement as the blower is in high speed in fan on position and cool modes and low speed in heat mode. Many furnaces today are equipped with a setting that allows the blower to run constantly at a lower speed or simply run for a min. or two after the A/C=Heat have turned off.
We had the same problem and changed the setting to auto and the unit seems to be working properly now. Not sure if this solves the problem, but for the past 1/2 hour the unit has stopped jumping between 00 and the temp we set.