2 ms·
It is already here. Two days ago our HVAC controller apparently lost contact with one of the sensors (as technician told me) and we nearly froze at night (-10 C
by omgtehlion 9y ago
It is already here. Two days ago our HVAC controller apparently lost contact with one of the sensors (as technician told me) and we nearly froze at night (-10 C outside) only to came back later to a desert (+35 C in most rooms).
I just yanked the thing out and adjusted all valves by hand. Fixing was $200. Now i'm thinking about replacing it with Arduino and simple PID controllers...
- rubidium 9y agoDont try and replace it with an arduino unless you want many more similar mishaps. But yes-- never buy an appliance touted as "smart". Furnaces should always be wired.
- ghaff 9y agoI live in the Northeast US and I'd never get a Nest. The risk associated with an additional heating system failure mode in the winter just isn't worth it.
- daveguy 9y agoFor traditional HVAC, because of the lag and few degree temp variance, you really only need the P part of a PID controller. But the same would happen of any controller. If the sensor goes bad it isn't going to work. Also, heat pump may require more sophisticated control.