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Riello Burner Series 40 F3 &F5 oil pump valve ohms reading
I have Buderus 215/4 with Riello Burner Series 40 model F3 &F5. What happens the burner blower comes on in 12 sec the oil flame is on. Then about vary 3 minutes later the motor blower is still running and the flames goes out never causing a "lock out". The burner re-fires again. First thing I did replaced the nozzle no change. Checked the oil pressure when running properly it was 150 psi and when the flame cut out 70 psi. After researching the pump valve coil could be faulty. Found the spec. ohm reading for pins 1 & 2 = 1350 ohms and 2 & 8 should be around 1500. I checked the resistance of the oil pump valve and found pins 1 & 2 1470 ohms and pins 2 & 8 1.7 ohms. Replace the coil and found the new coil has the same resistance as the original coil. I still replaced the coil and no change. I would like to know the correct ohm reading and the purpose of this valve. Maybe the new coil is bad??? Trial fitted the primary control box too. Any question please ask and Thank you Dan