On 5/27/25 12:34, Adam Moffett wrote:
Does anyone here monitor air conditioners? If so, how do you do it?
Up until now, I would find out about an A/C failure by getting
temperature alarms from equipment. When I look at the chart of
temperature over time it usually looks the A/C fail happened hours
(sometimes many hours) before the temperature got critical. It'd be
nice to respond sooner.
One simple thing to start with is take two temperature sensors and place
one in the air stream before the coil and one after the coil. If the air
temperature drop is less than 20 degrees F while it's running in cooling
mode, you are going to have a problem soon.
Getting a little fancier: tap all of the thermostat wires and contactors
so you can read all of the control wiring states. i.e. if the tstat is
calling for cooling but the compressor contactor is still de-energezed,
you have a problem.
Adding a differential pressure switch across the blower can detect
blower motor failures and/or weak airflow depending how sensitive it is.
~Seth
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