For the chain and belt-drive openers common in homes built around 2003, we carry drive gear and sprocket kits, replacement logic boards, travel limit switches, and safety sensor pairs on the truck for most calls. We also stock capacitors and circuit boards for the mid-size residential motor units that match this housing stock, since that's what we're swapping out most often on these jobs.
What we don't carry on the truck: parts for commercial-grade or heavy-duty openers, and obsolete board models for openers old enough that the manufacturer's stopped making replacement parts. If your opener falls into either category, we'll tell you on the spot rather than make you wait on a special order we can't confirm, and we'll lay out what a full unit swap costs against a parts order with an uncertain lead time.