Questions & Answers for: Mr. Heater lockout code

it wont light. the light inside is flashing 2 times systten lockout i want to know what to check Hi first clean the flame senser ,check the fan control is clean , then jump out the pressure switch see

...lockout mode. Code on the heater says lockout mode, failure to detect or sustain flame. The heater is only a couple of years old, is this normal, how do I fix it, and will this happen often? I would ...

mr heater 45000btu is flashing system lockout failed to detect or sustain flame. check flame sencor is clean and connections are tight clean ignitor , seeif thie helps or jump out pressure switch see ...

...lockout according to the 2 flash code I'm seeing. My tank is half full so I no it's not a supply problem, and it has worked in the past. It tries to fire but it won't stay lit. It will go through the ...

I have a mr heater 75000 with a 4 flash blink code. the heater is brand new, only worked for 3 days. i have bypassed the 2 switches but still cant clear the 4 flash blink code. According to the Owners

Ignition flame erratic. 3 tries and then into lockout mode. clean the flame sencor first then check wire from sencor is not loose .Jump out pressure switch some times you can fool it in to ...

...LIKE A PRESSURE SWITCH MALFUNCTION OR A OBSTRUCTED FLUE EXHAUST. 2 FLASHES MEANS YOU ARE IN SYSTEM LOCKOUT. ATTEMPT TO START 3 TIMES THEN IN LOCKOUT MODE RIGHT? YOU WILL NEED TO TURN OFF AT T-STAT

mr. heater model mhu45 combustion air blower will not start. len on circ uit board blinkiing s times. cleaned flu ahd vent exshaut. checked pressure switch and is closed prior to trying to start, ...

the led light is flashing 2 flash's saying system is in lockout, failed to detect flame, how do i fix this The infrared heat/light sensor is either faulty or covered up (soot?)

...It sounds like the ignitor is not working, Since the heater is not detecting a flame it goes to lockout. Check the ignitor wiring to see if it is in good shape. Sometimes the connection where the ...