A FL-4 error is an ignitor failure. There are three things that need to be checked to correct the issue. First is the ignitor. Replace if broken or burnt or cracked. Second is the 220/120 vac conversion plug that is plugged into the main board in the burner compartment behind the box cover. The black transistor may be burnt. Replace if burnt. This will happen often if the heater is connected with 220 vac power source. I highly recommend connecting to a 120 vac source if possible. The heater seems to like it more. But remember when switching power supplies to follow all manufacturers instructions on doing so. If after replacing these two items the FL-4 problem still occurs, the control board in which the conversion plug plugs into also may need replacement. This should correct the fl4 error.
I have had the same problem. I have replace the circut board, the igniter and the gas valve and still can't get my heater to start. Do you have any other advice?
Does the black transistor have a number or could a better description be given. Thanks
does this black transistor have a part number or could a better description be given. Thanks
The black transistor is part of the " power conversion plug"(part name). This plug is a small 1"x1.5" board that plugs into the main control board. I has two colored ends on it. One blue, one red. Also some older model heaters. Have in-line fuses on the wires going to the ignitor. Check to see if these are blown.
Rewired to 120 and flipped conversion plug around cause I just bought a vs pump with external timer. Heater fired right up. Thanks so much!!!
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FL4 is an igniter error. You can attempt to repair it yourself following some of Jandy's remedy's from the owner's manual, found on page 40. Electronic heater ignition problems are generally better left to a pro. For a local service provider, try their search page here.
SOURCE: fl4 and fl3 fault
fl3 not rectification fl4 fault ignitions must replace ignitor kit and rectification kit from jandy need model # for parts
So, you replaced part R367100 (Igniter)? This part if very susceptible to failure if touched. I would inspect and/or run a continuity check to make sure it has non cracks. Does it glow red when you attempt to start the heater? Remember, that is the how it ignites the flame, by getting red hot.
If it glows red hot, but does not light then I'd do the following testing in between;
Check that the inline fuses on the igniter aren't blown,
Check if the control board is sending a charge,
Check the flame sensor for gunk build up. Unfortunately to replace the flame sensor look like you have to purchase a whole new burner assembly to get a new flame sensor.
I also believe there is a toggle switch on the front door. It may need to be depressed before the system will ignite.
Igniter circuit is open. Check fuses on igniter wires. Identify and correct loose or broken wires.
Element has a fine crack in it. Replace
Igniter fault. Replace igniter.
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