My Jandy Heater contol reads.. Fault check ignition control> what should i do?

check the high limit safeties, and thermal fuse for the high heat fault........ignition control can be a separate issue

If this heater is hooked up to automation check the temperature reading on the indoor remote. If it reading over 104 the sensor is bad and the heater will not fire thinking that it is at set temp.

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.

After reading the manual at http://www.jandy-downloads.com/pdfs/H0248900D.pdf, I found the FL4 fault indicates an igniter failure.

The possible causes are:
A. Igniter circuit is open.
B. Element has a fine crack in it.
C. Igniter fault.

The recommended correction is:
A. Check fuses on igniter wires. Identify and correct
loose connections or broken wires. Refer to
qualified personnel.
B. Measure room temperature resistance and
ensure value is in the correct range. See manual
for details. Refer to qualified personnel.
C. Replace igniter. Refer to qualified personnel.

If you have a volt/ohm meter you could measure the AC voltage going to the igniter when it should come on. If you see 120 VAC then replace the igniter. If the ignitor lights up and the gas valve turns on and there is gas pressure then the heater should light up.

If the 120 VAC doesn't get to the igniter you can check the items in the above lists and if not resolved call Jandy technical support at 800-822-7933 and they should be able to help youfigure this issue out. I hope this helps.

Please vote on this answer. Thank you.

Well sounds like a Engeneering. Most Engeneers can't figure out how to open the box without a drawing

The fuses found in the lead wires or next to where the lead wires connect to the ignition control board. Find them and confirm with an ohm meter and replace them. Be sure to check the ignitor leads for a ground fault prior to restarting the heater since a ground could have caused the old ignitor to fail and not correcting it will blow the new one as well.

John

Next check the sensor on your heater. If it's not that you may have a problem with the ignition control in the heater.