Upon arrival system not operational. Control Board in lockout for failed ignition. Reset board. System fired up and then dropped out after a few seconds. Inspected flame sensor. Flame sensor ok. Inspected control board. Several cracked solder joints on the back of 12 pin connector. Readjusted plug and unit fired up and completed sequence of operation. Cycled several times. Issue is intermittent. Control board is failing. Hot surface igniter is testing at 60 ohms. Blower motor is operational and not leaking a visible amount of oil at this time. Signed on club membership for routine maintenance and savings.