Goodman Non-Communicating DisComfortNet - Part 1 of 3
Channel: Brian Greul
Date: 2020-05-27

The ComfortNet on my Goodman 16 Seer AVPTC / DZSC system failed after a nearby lightning strike.  Best guess is induced current on the low voltage wiring fried the serial bus that it uses because Emerson failed to protect the interface with some resistors and diodes.  

Anyhow, Part 1 is about diagnosing the problem and verifying that it's not something stupid like a blown compressor.

Part 2 is rigging up a Legacy multi-stage thermostat with Wifi (Honeywell T9) to replace the CTK04 Honeywell Good(fornothing)man $600 paperweight.

Part 3 will be tidying up the install and putting conduit in because I forgot to run it.

As usual I'll put a playlist together to make it easier to find the related videos.  A big thank you to Israel's AC of Louisiana for his YouTube video that pointed me in this direction.