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Thanks for that input..it sounds like you know what you're talking about :) The typical PTC behaviour is a bit of a question here for sure, as I'm essentially ignoring the PTC resistance ramp with temperature and just feeding the two heaters a calculated wattage based on the fresh air temp...

Ahh, yes you have identified my achilles heel. The rabbit hole. The HRV project has been running now very nicely for 3 years 24/7, and the boss (wife) and daughters never complain anymore that the house "feels stuffy". This project is essentially an electronic differential magnehelic gauge...

I've been wanting to figure out a way to get differential air pressure readings into the house automation system so I could actively balance my HRV. I've modifed the HRV so instead of an old AC fan internally, there are now two ECM inline fans (one for fresh air, one for stale). I figure the...

Not sure the girls even noticed..ha. At least the ice cubes stay frozen now. I've been wanting to figure out a way to get differential air pressure readings into the house automation system so I could actively balance my HRV. I've modifed the HRV so instead of an old AC fan internally, there...

Regardless of what system you use, for new construction I would have a switched receptacle (s) installed right above your upper cabinets. This way you can put drivers etc hidden on top of your uppers. I have used a lot of different systems at this point, but the IKEA Tradfri stuff has modular...

I think the specific stuff to try is the HD LifeProof which has a 30 mil wear layer, and does not use adhesive. It is also waterproof. During COvid my daughter did her dance classes on our basement floor for pretty much the year. That included tap with steel tipped shoes hammering away. Not...

You could use 2” high density XPS, steel grid and another 2” of concrete. Did this for a commercial retrofit, zone 7A. That worked well for us and drove pallet jacks loaded up over it routinely. The XPS we used was not high density and we had zero issues. We also installed radiant in the 2”...

This is my last fridge/freezer post, I promise...ha! Below is the data plot with the new controller board running things for 24 hours. My home assistant code ran the fridge pretty much identical to the control board! For someone just interested to see how a "modern" efficient fridge works...

I guess my stint as a fridge repair guy went well, ha. The new control board arrived today and is doing it's thing :) The "hacked" former control board has been replaced with the new OEM version. I was controlling based on a -20C to 18C window, and the OEM board is running the fridge to...

Good luck with that claim! I'll be super interested to hear how that one turns out. I think the pics you took inside the fender may help your case too. All sorts of companies offer "corrosion warranties" and I don't think I've every heard of one actually being paid out. Fingers crossed for...

Some interesting insights maybe for the next person troubleshooting one of these IKEAVÄLGRUNDAD refrigerators. It looks like the compressor runs at about 100 watts, and takes a significant amount of time (like 4 hours) to take the freezer from -7 to -20C. You can also see the power spikes...

Thanks for the confidence vote @drivesitfar :) Talk about a crash course in fridge operation/logic..see below! I noticed, based on reported power use from the fridge smartplug, that the evaporator defrost logic seems to use an elapsed time counter that is not reset when you fully power off...

I wish I could take all the credit, but I'm not an expert on fridge repair by any stretch. That said, ChatGPT more or less led me in the right'ish direction to come up to speed on the how things likely should work. At the end of the day, that "click" from the control board followed by crickets...

Just about 5 years ago when doing the kitchen reno, I also replaced the appliances. The "new" fridge is an IKEA Valgrundad (704.621.58) . Like all of IKEA's appliances, these are usually made by companies like Whirlpool...but this fridge is definitely made by Midea. I deliberately chose a...

Cocoa is living her best life for sure. She LOVEs going on the trails and is perfectly behaved with other riders and dogs. When my brother throws his bike in the truck she naturally knows what's going on, and gets all fired up. We tend to scale back rides a lot for her (she's getting older)...

Whipped up a magnetic pull test rig to compare the magnetic holding properties of different induction pans. Fun little project using a few 2x3s, carriage bolts, snowblower control spring and cheap fish scale. Rattled around in the cranial cavity for a few days and came up with this…works...

More interesting "science" on the induction cookware testing. This Tramontina "Signature" 2.8L pot set a few records in my latest test. It boiled a liter (quart) of water the fastest so far, and used the least power doing it, about $.016 worth. What I'm finding interesting is that the various...

Out for a ride with my bro and his pup..in the rain. Best trail dog ever. Rainbow in the background…

Thanks Nick for taking the time to provide all that feedback! Ai has made it a LOT easier to jump into the pool, knowing that you have a highly technical and tireless assistant at your side. I figure we’ll all become flash bags, or just a lot more productive as the tech progresses. Ha. I had...

Thanks for the vote :-) I’m curious to see how the vid does at the end of the day…