Re: you can fry a Nest thermostat - on the RFI hunt
Shawn / K7ATA
First thing to do is put RFI filters on ALL of the control runs connected to the nest; this SHOULD eliminate a lot of its radiated noise, and will probably protect it some as well.toggle quoted messageShow quoted text
Common mode chokes with bypass capacitors would be my first step.
On 9/14/2020 10:26 AM, Ryan - KJ7GIE wrote:
Wanted to share this bit of info I've run across in my hunt for RFI in my house. Using an AM radio I noticed my Nest Thermostat was _very_ noisy. There is also no way to turn the thermostat off; it will simply drain the battery and then shut itself down which is the only way to actually get the thing to go off. But, I also identified, as I was hunting online, more than a few people have fried their Nest Thermostats on 40 meters. I guess running a long wire, from HVAC to thermostat, and then filling the thermostat with tiny fuses and FETs just doesn't play nice with amateur radio.