We have a Lennox G20Q5/6E-150-1 furnace and an Aprilaire 8363 thermostat that has worked flawlessly for a number of years... UNTIL we added an Aprilaire 600 whole house humidifier.

Now the system cycles in short bursts, seems to "brown out" like a slow loss of power, sometimes the humidifier shuts down.

Would upgrading to the Aprilaire 8570 thermostat solve the issue and is it compatible with the humidifier and furnace?