first thing to do is to comfirm which Band you local celltower is on- your phone's diagnostics might show this, or download an app like Networ Cell Info or the like.
Yep, on our Cool Energy unit the main pump is under PWM control based on in-out Delta as far as I can see. Min, max, and startup speed are all configurable though.
I hate to say it but... there's a global pandemic thingy. Administrative and physical processes have ground to a halt in all sorts of ways- a friend's 12yo daughter recently waited five months for an Urgent cancer investigation. It's a grand excuse this COVID but even when it's not an excuse it slows things down to walk-ing-in-custard speed.
If actual rules are being broken then sock it to them with the full force of legality or enforcement. Else (sorry) you're gona have to "suck it up @ToughButterCup" just like the rest of us?
we had an "industrial" segment in my Industrial Physics and Microcomputing course at Napier. One day a week at the Jewel& Esk vocational college. I've a tap wrench, a toolbox, and some random PCBs to show for it...
If a TF supplier doesn't have the flexibility to give you what you want, you want a different supplier. Whilst everyone has their standard packages, I had no problem getting pricing on options to suit my requirements...
metals warp with heat, it's what they do. But a stove that's uncontrollable is obviously getting air from somewhere it shouldn't. Are there any "fixed" apertures with screw adjustment? Is there a thermostat and has it's calibration been checked? Does the door need a new rope?