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Honeywell L7224/L7248

rpagano Member Posts: 1

December 2023 in Oil Heating

Replaced boiler control yesterday. The boiler is not firing. The control is throwing code STA 8. The TT is not staying green.

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Comments

109A_5 Member Posts: 2,316

December 2023

Hello @rpagano,
Where does the TT come from ? Thermostat, or other equipment ?

National - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System
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HVACNUT Member Posts: 6,688

December 2023

Try jumping TT.
Could be the thermostat or wiring to TT.

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