I have an Armstrong Air Ultra SX 80 gas furnace. It tries to go into its start up sequence and seems to lose power just before the blower kicks on. Sometimes the flames ignite and sometimes they don't before it shuts back down and immediately tries again. Eventually it starts, sometimes after about 8 to 10 tries and there is always a lot of clicking going on in the blower compartment. The clicking sound seems to be what causes it to lose power on some of the attempts. What do you think?