Derrick, Since you know the accumulator is good then yes it could be the check valve in the fuel pump. But what pump do you have, the 984 with the built in or the 957 external. You can't service the 984, check valve. But the 957 pump has a bolt on check valve can be replaced. I have both in stock and you can see them on the web site. I can also send you a check valve if you want to try it if you have the 957. If the blower motor won't come on speed one or two, then the first thing to check is the voltage going thru #10 fuse coming from the auxiliary relay, going to the mode switch. If it's not making it to the fuse then, relay may be the problem, if it's going to the fuse but not coming out, then fuse or fuse contacts may be the problem. Tighten the contacts anyway. Then if it's coming out of the fuse going to the mode switch. Then maby a bad mode switch. All along the path is finding, where did the voltage go to or stop. Then last but not least you have three resistance wires to go thru to power the blower, if any one of them is broke. No blower. Diagram is on the web site. John hervey, http://www.specialtauto.com/