Although we did a twice yearly a/c check up before we moved here, we had the unit checked out when we first moved in and asked the tech about a twice yearly service. His response was, Why, it's a known rip off! He's the guy we're going to call when it eventually goes wrong.
Other than changing the filter every month and pressure washing the unit we have done nothing to it for almost six years. Any company will come out and service it whether you have a contract or not so save the money.
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