R7824U-1004 Honeywell Oil Primary

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Old 11-14-17, 01:03 PM
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R7824U-1004 Honeywell Oil Primary

I replace the oil primary on my oil forced hot air furnace. Honeywell R7824U Honeywell Oil Primary, works sometimes. Other times it goes to ignition trial and then goes to hard lockout? Any ideas what could be wrong??
 
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Old 11-14-17, 04:32 PM
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Welcome to the forums.

Thread moved to the gas/oil furnace forums.

You replaced the primary control because the system was intermittent or now that you changed it.... it's intermittent.
 
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Old 11-14-17, 07:41 PM
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furnace was doing the "ignition trial" so I change the oil primary. Still did it with the new Oil primary. I changed thermostat and it works sometimes but still does not fire and shows "ignition Trial" at times.
 
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Old 11-14-17, 08:08 PM
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The ignition trial is one step in the start of ignition. If it fails the control should go into soft lockout.
Has the boiler been cleaned recently ? This should be done annually.

R 7824 troubleshooting.pdf
 
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