We keep a spare capacitor for the AC in our pantry. Our neighborhood experiences power surges fairly regularly, and those will blow out the capacitor. This year it happened on July 2, when temps were over 100 and everyone was closed for the holiday. Took my husband 20 minutes to replace the capacitor and get the AC back up and running. This is probably the 3rd or 4th time it’s happened in 5-10 years. Capacitors are cheap, and the electrical connections straightforward.