Tan arrived right on time and was very thorough and efficient. He was here to perform my annual a/c and heating checkup, explained everything he was doing, and made a couple of suggestions to improve efficiency and/or head off a potential valve problem with the furnace next winter. He and his helper cleaned up very well when they were finished and everything is now working perfectly. I recommend him highly. The service was included in an annual contract I'd already purchased, which also specified a 25 percent discount on all replacement parts, so the price for this house call was very reasonable.
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