Pilot1

Thank You Scott. . The pumo is single speed, I believe at least 1.5 HP (may be1.75 HP) I will have to double check . I am still shopping for the switch.

Thank you PoolGuy and Bugman. I have shorted the lead to pressure switch and it fired right up. There was 28 v going into it but only 19 coming out. That's the good news. the bad news is while I was taking out the lead wires off, the switch broke and water started shooting out. But I guess I needed a new switch any way. Now I am looking for one online and they more expensive than I thought. About the codes I were getting, the fenwal blinks once, meaning Air Flow problem but I do not have a blower! Anyway the fenwal was not getting 24v becuase of the bad pressure switch, and it works fine once it recieves 24v. I need to check if it still blinks when the valve fires up. Would a pressure switch with 3.1 PSI minimum rating work even though the manual says to use a 2.0 PSI switch? Also the manual syas to put some 50 w oil in the copper tube of the switch. I assume this is needed to keep water away from the switch to prevent corrosion. Would 10-40 oil be OK?

Hello, I've been searching this issue online and came across this forum. It's been very helpful. my problem goes like this: The HSI igniter glows but the valve won't open. I was able t narrow it down to low voltage reaching the valve. It's recieving about 18v instead of the specified 24 v. Is 18 v too low to open the valve? I checked the output from the transformer and It's where it's supposed to be at 28v. Why would volatge drop about 10 v (from 28 to 18), from the transformer, through the switches and the fenwal controller, to the valve? Any help or suggestions on what to test/do next is appreciated.