Yeah, Wi-Fi dependency makes me uneasy too. I've seen thermostats with battery backups that kick in during outages—might be worth checking if yours has that option? Better safe than sorry, especially mid-winter...
"Better safe than sorry, especially mid-winter..."
Couldn't agree more with this. Last winter was my first as a homeowner, and I learned the hard way about relying too heavily on Wi-Fi thermostats. We had a pretty nasty storm that knocked out power for almost two days. My thermostat was completely Wi-Fi dependent, and without power or internet, it was basically useless. Thankfully, the boiler itself was fine, but without the thermostat functioning properly, the house got chilly fast.
After that experience, I did some research and ended up installing a thermostat with battery backup like you mentioned. It wasn't too complicated—just had to double-check compatibility with my boiler system first. The peace of mind alone made it worth the effort. Now if we lose power again (which seems inevitable around here), at least I know the heating will keep running at a basic level.
Also, speaking of tricky boiler plumbing... figuring out mine was definitely an adventure. The previous owner had done some DIY modifications that weren't exactly up to code or logical in any way. Took me a weekend of tracing pipes and watching YouTube tutorials before I felt confident enough to make adjustments myself. It's amazing how much clearer things become once you've mapped everything out yourself.
One tip I'd offer from my experience: label your pipes clearly once you've figured them out. It might seem unnecessary at first, but trust me—when you're troubleshooting in the middle of winter or trying to explain something to a plumber over the phone, those labels are lifesavers.
Anyway, good luck with your setup—sounds like you're already on top of things!
Totally agree on labeling pipes—saved me more than once. Another thing I'd suggest is keeping a spare thermocouple handy if your boiler uses one. They tend to fail at the worst possible moment (usually midnight, mid-blizzard...). Swapping it out isn't complicated, but having one ready to go can mean the difference between a quick fix and a freezing night waiting for parts. Learned that lesson the hard way myself.
Couldn't agree more about the thermocouple—seen plenty of midnight calls that could've been avoided with a spare on hand. Another thing worth mentioning is keeping a spare pressure relief valve around. They don't fail as often, but when they do, it's usually messy and urgent. Had a customer last winter whose valve started leaking badly during a cold snap. Luckily, I had one in the truck, but if you're DIY-ing your boiler maintenance, it's a cheap part to keep handy.
Also, labeling pipes is great, but I'd add marking flow direction clearly too. Seen plenty of setups where someone labeled pipes but forgot to indicate flow direction—makes troubleshooting circulation issues way easier if you know exactly how the water's moving through the system.
One last tip: snap a few clear photos of your boiler setup when everything's working fine. Sounds simple, but having a visual reference can save you tons of guesswork later on, especially if you're tired and stressed at 2 AM trying to remember how things looked before something went wrong...
Good points on the spare parts, but honestly, I'd be cautious about recommending DIY replacements for pressure relief valves. Sure, it's a cheap part, but I've seen homeowners swap them out without addressing the underlying issue—like excessive pressure or overheating. Had a call last year where someone replaced their valve twice in a month before finally calling me in. Turned out their expansion tank was waterlogged, causing repeated valve failures. So yeah, having spares is handy, but if your relief valve pops more than once, it's probably time to dig deeper.
Totally agree on marking flow direction though—can't count how many times I've stared at unlabeled pipes trying to mentally trace the flow path. Photos are helpful too, but I'd add jotting down some baseline pressures and temps when everything's running smoothly. Numbers can tell you a lot more than visuals alone when troubleshooting at 2 AM...