HoneywellL8148A1017 Immersion-Type Controller

replaced old controller. working fine. controls my oil fired furnace boiler. reasonable price.

Had issue with the burner not staying lit on the boiler which resulted in no heat. Had a service person come to the house and he said that the aquastat was bad and gave a quote of over $1000.00 to fix it. Well looked around and found this exact replacement for the bad one on the boiler. Read the install directions and change out was very easy. Adjusted the high temp cutoff to be the same as the old one that was removed, hooked up the wiring and was good to go. Heating system works as it should. Saved close to $800.00 DIY!!

Last piece to get the furnace running again after a lightning strike.

Easy to Install Works fine

The device has a design flaw which results in the leads on the relays burning off in time. If you are buying a replacement, this is probably why. The connections are left far too long from the factory and can flash over to other parts of the board, and a few of the traces are light on solder.Pull back the four metal tabs holding the IC board in, lift the board out. Dab a soldering iron on any funky looking joints and trim back terminals to the board with a pair of end cutters. If you have a hot glue gun, slather the whole back of the Ic board with about 1/8" of glue. With any luck it will be the last replacement you ever have to buy.

Was not a Honeywell but it is the brand that took over Honeywell. So its a direct replacement. Came packaged well and was half the cost compared to HVAC and plumbing stores near me. Fast shipping and was easy to install and working great!! Didnt give 5 stars because it says Honeywell and its NOT a honeywell. I would still buy it again!

Even though I'm giving this five stars, I just want to mention that the little "doors" on the end of it are a bit of a pain to open, and there are some sharpish edges on the thing that you could cut yourself on. Since it's not a toy or something you'll use all the time, but a boiler part, I suppose it's to be expected that you might have to be a bit careful with it and/or wrestle with it. That aside, it's a solid unit that isn't at all flimsy, and we managed to put it onto our boiler ourselves in short order. This is our second winter with it in place and it's working like a champ. No issues with it and we'll happily buy another when/if we need it.

My husband bought this in August 2017 and is just now getting around having our heating/plumbing guy in to install it. He noticed when he initially opened the package that the knockout were already knocked out but didn't think anything of it. WELL, the tech couldn't finish the installation b/c it doesn't work!! Not only are we out the cost of this faulty piece of equipment but we are also out the $$ for the plumbing/heating tech. I won't be a happy camper when we have no heat this winter!!