Tip: Keep spare parts on hand before you actually need them - assalamu alaikum

Assalamu alaikum - just learned this the hard way and got lucky. I’ve had a gas furnace at home for five years with no issues, then out of nowhere it wouldn’t fire up. We were about to get slammed by a big winter storm here in the mid-Atlantic and then some prolonged cold - could’ve been a disaster for the house. I didn’t want to pay someone hundreds to diagnose it, so being a bit of a DIYer I checked things myself. Turned out the furnace igniter had failed, which apparently happens eventually. The problem: you can’t buy that part at local stores - HVAC shops have them but they won’t sell direct to the public. I ordered it online and they estimated four days, which in the middle of a storm probably meant even longer. If it had been delayed I’d be freezing. Luckily it arrived just before the worst of the weather and I got the furnace working. The part was only about $30 and swapping it was just taking off a panel, unplugging one connector, removing two screws, and putting the new piece in. If it had been a day late I’d have been in a bad spot and might’ve paid a lot for emergency service. Do yourself a favor - buy a few common replacement parts for the critical systems you rely on (furnace igniters, filters, things like that) before you need them. It’s a small cost and can save you stress and big bills later. May Allah keep your home safe.