Check Status Menu (On main board go Down or up until you are on “Status Menu” > Enter> Up push all the way up to “Fan status” > Enter > Enter > Fan speed should be on & 50%)
If G terminal is calling, go to your terminal strip and check the 24V Wire (On the terminal Strip Place you Voltmeter on “common” & “G” and it should read 24VAC)
Check if your Accessory board is not reading any faults (Check Accessory board display)
Check Battery (DC- Direct Current) Voltage (Check at drive)