On a call for heat, the gas valve opens and passes the gas to the burners where a small pilot flame that stays ON all the time lights the main burners. These furnaces don’t have an Inducer motor. Pilot light out is the most common problem among older furnaces. The furnace pressure switch ensures there is no blockage in vent pipes. Pressure switch which senses negative pressure in the venting turns off the furnace. Sometimes snow piles up and blocks the exhaust or intake vent pipes, which causes the pressure switch to open. On High-efficiency furnaces check to see there is no restriction in front of exhaust and intake vent pipes. ĥ: Clear Your Furnace Vents For Blockage :
Be careful when touching the motor, sometimes it becomes too hot and can burn your fingers. The Inducer motor is located on the top compartment of the furnace.Ī simple way to test the inducer motor is by touching it, if it feels too hot that means it’s burnt. Inducer motors exhaust the flue gases out of your home when the furnace is working, if the inducer motor stops working your furnace also stops working. Once the thermostat calls for heat, the inducer motor comes on to make sure there is no restriction in the exhaust and intake vent. For example, if eleven and one-half flashes are counted followed by a one-second pause, and then eleven and one-half blinks are counted again, the target airflow is approximately 1150 CFM. When the flash sequence is complete, there will be a noticeable pause of approximately one second before the sequence repeats. The CFM LED is an indication of target airflow. This is a reasonably close approximation of the airflow pushed by the blower motor through the furnace. Connect the power wires correctly, line to line and neutral to neutral. Clear the venting and clean the pressure switch, make sure the inducer motor is working. The limit switch opens the main limit or roll-out control. Clean the pressure switch check the exhaust and intake flue venting. The pressure switch stuck open switch will not close when the inducer is on. Ignition failure – 1 HR lockout (Check Igniter) It depends on what brand of furnace you have will have its own troubleshooting flow chart. Note the flashing sequence and match it with the LED error codes given on the back of the furnace cover or on the user manual. You can check how many times the LED either red or green or combinations of both lights are flashing. This see-through glass is to check the furnace fault codes.
On the bottom compartment, you will find a see-through round glass. You will see the top and bottom compartments of the furnace. Note: if the breaker is tripped that means there is a possibility of a short circuit in the furnace or electric wire, you then should call an HVAC contractor immediately. Check to see if the furnace breaker is turned off or moved in the middle, if it is turned off you can simply turn it back ON and if it’s moved in the middle then you will turn it fully to the OFF position and then turn it back to ON position. Next, make sure that there is power going to the furnace. Furnace Repair Guide 1: Thermostat Problem:Ĭheck to make sure the thermostat is calling for heat, if the thermostat is battery operated check to see if the batteries need to be replaced.
0 kommentar(er)
