Diagnostic: previously came out to do a tune up and the float switch had tripped wile on site. Returned to ensure it was not a something we caused. Verified the there is a clog in the drain line. It does run to a trap under the sink. Emergency drain pan has quite a bit of water in it but there is a pan switch installed. Gave the recommendation of the repair but the customer did not wish to do so at the moment. Fee waived by the manager.