Did they preventative maintenance on a train gas furnace. During the maintenance I noticed the heater was not working. To make the furnace operational we would need to replace gas valve also would need to replace burner rack and would need to replace hot surface igniter and flame sensor after telling the customer this and the pricing of the repair quote and that it’s not guaranteed he is having Steve come out to quote him a new system. M#TUX1B060A9361AB s#63735SM7G