If you have your thermostat set to a warm temperature however you have noticed that it’s not turning on, you’re likely experiencing a minor issue that you may luckily be able to fix yourself.
If your oil furnace is not turning on, you should beginning by checking your thermostat, air filter, circuit breaker, blower cover, condensate pump and line, and oil furnace switches. If your oil furnace is not turning on, the first thing you should do is check your thermostat and make sure the batteries are not dead, and the setting is on heat and fan setting is on auto. If your thermostat is not on heat and auto and/or doesn’t have fresh batteries, it may not turn on. If everything is well, then you should next check your air filter. If your filter is clogged, it will reduce the airflow to your oil furnace, which can cause your oil furnace to overheat and shut off; Filters should be upgraded every 1-3 months. The circuit breaker tripping can also be a cause of the oil furnace not running properly. If the circuit labeled oil furnace has moved to the middle or neutral position, the breaker has tripped. Turn it off and back on. If your oil furnace was recently diagnosed or you took the cover off of your oil furnace to check something, the blower cover may not be on as tightly as it needs to be. Many gas furnaces have a safety feature called a blower door safety switch that prevents the oil furnace from turning on if the blower cover is not secured tightly. If there is a block in the condensate pump or drain line, water may back up in the system, triggering the plan to shut down to prevent water destruction. If there is a blockage, a specialist will have to clear it. There are a variety of safety switches in your oil furnace that each monitor a certain area of your oil furnace and will trigger the plan to shut down if that area is not working properly. Be sure to check the pressure switch, flame sensor, limit switch, and flame rollout switch, but you might need to read your oil furnace manual to get a better system of which switch is indicating a problem. You can also make the decision to call a Heating, Ventilation and A/C professional to diagnose the problem.