Trying to figure out what got my heater working after a lot of unsuccessful troubleshooting in case I have the same problem again. Any insight would be helpful.
Opened the pool this week and everything worked except the heater (Hayward H300FD). It would click on and fan would run but I kept getting the IF error. I checked the gas line valve (natural gas) was open. I made sure heater gas valve was turned to on. I disconnected the manifold and cleared it out with a wire, but there was no obvious spider web or obstruction. I visually checked ignitor and it glowed red when heater was turned on. I checked the flame sensor and cleaned it with a dollar bill, but it looked pretty clean. None of the previous interventions fixed the IF error.
I had a NG home generator installed in the fall, so I was concerned that something had interrupted the gas supply. I did not have a manometer, but I figured I could at least smell if gas was coming from the inlet pressure tap plug. I removed the plug and opened the gas line. I smelled gas so at least I knew that there was no upstream problem. I then replaced the inlet plug and opened the manifold pressure tap plug. I started the heater and to my surprise it started running. I quickly shut off the gas and replaced the manifold pressure tap plug. I then restarted as usual and it ran normally. Any idea why opening the inlet plug and/or manifold plug would have fixed the problem? I did not adjust the regulator in any other way. Thanks
Opened the pool this week and everything worked except the heater (Hayward H300FD). It would click on and fan would run but I kept getting the IF error. I checked the gas line valve (natural gas) was open. I made sure heater gas valve was turned to on. I disconnected the manifold and cleared it out with a wire, but there was no obvious spider web or obstruction. I visually checked ignitor and it glowed red when heater was turned on. I checked the flame sensor and cleaned it with a dollar bill, but it looked pretty clean. None of the previous interventions fixed the IF error.
I had a NG home generator installed in the fall, so I was concerned that something had interrupted the gas supply. I did not have a manometer, but I figured I could at least smell if gas was coming from the inlet pressure tap plug. I removed the plug and opened the gas line. I smelled gas so at least I knew that there was no upstream problem. I then replaced the inlet plug and opened the manifold pressure tap plug. I started the heater and to my surprise it started running. I quickly shut off the gas and replaced the manifold pressure tap plug. I then restarted as usual and it ran normally. Any idea why opening the inlet plug and/or manifold plug would have fixed the problem? I did not adjust the regulator in any other way. Thanks
