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System 2000 blinking 145° error
My oil fired system 2000 is (5-7) years old.
It started shutting itself off with blinking 145 error = circulator or temp sensor.
Both have been replaced but the problem persists.
I have had to disconnect the red wire from temp sensor and turn the high temp
control down to 139° to get it to provide heat .
Any ideas on what's going on