View Full Version : Day & Night Gas heat INOP
richwho
Mar 10, 2008, 06:24 PM
I have a Day & night model 588, the ignition circuit board LED indicates a fault #8 (internal control fault). Are there voltage checks to confirm that the circuit board needs replacement.
hvac1000
Mar 10, 2008, 06:28 PM
Looks like circuit board.
8 Flashes Internal Control Fault •
You might check all the grounds from the furnace back to the main electric panel.
richwho
Mar 10, 2008, 06:47 PM
Looks like circuit board.
8 Flashes Internal Control Fault •
You might check all the grounds from the furnace back to the main electric panel.
Thanks! I will check the ground connections. If this does not work I will need a replacement circuit board. Do you know what the replacement circuit board is for the original 48SS500177 board.
hvac1000
Mar 10, 2008, 07:35 PM
I find no listing for that part number.
Example of numbers below
http://heatcoolparts.com/webpages/Carrier/PCboardsIgnitionControls.html