01/22/2020
During a home inspection in the colder months, I always have to explain to my clients why I can't run the air conditioning to inspect it. Not one time has a client known to NOT turn on the A/C if the outside temps have been colder than 60 degrees for 24 to 48 hours prior.
So, for those of you that dont know.....YOU CAN RUIN THE COMPRESSOR IN YOUR CONDENSING UNIT if the outside weather has been below 60 degrees in the few days prior to you wanting to turn on the AC. The compressor is a very pricey part in your AC system.
Just like engine oil, compressor oil for condensing units has different grades. The oil that is used in central air conditioner compressors is summer-weight oil. It is a heavy grade of oil that works well in warm conditions. It can heat up and still provide the compressor with the lubrication and protection required, something lighter grade of oil could not do. In cold weather, the oil is too thick for the safe functioning of the compressor.
Some newer AC units are now equipped with low-ambient temperature sensors that prevent the compressor from turning on in cooler weather. If you are unaware of your units capabilities, this could lead you to think your system is malfunctioning.
So, whether you have an older or newer unit....IT IS BEST THAT YOU JUST DON'T TURN ON YOUR AC UNTIL OUTSIDE TEMPS ARE ROUTINELY ABOVE 60 DEGREES!!
