Gas Furnace Ignitor
Igniter For Gas Furnace:
About Our HVAC Directory, Whether you are buying a new home, fixing up a home you bought, or renovating the home you are right now living in, HVAC contractors can play a huge role in the comfort, energy efficiency and durability of your home. Heating & Cooling Services are important products offered by HVAC contractors and is one of the first few items to cross off your checklist.
How to Fix the Ignitor Problem on a Furnace; How to Fix the Ignitor Problem on a Furnace?
A cracked or badly discolored igniter tip indicates a faulty igniter which can be corrected. Furnace Not Heating? Gas Furnace Troubleshooting; How It Works: all you can study. If the igniter is not cracked, use a multimeter to test the igniter for continuity and proper functioning.
Rest assured that HVAC Contractors will help you find heating and cooling services in your local area without any headaches or hassles and putting more efforts. Heating and Cooling services can vary in price and quality so make sure you ask your HVAC provider the appropriate questions and provide right details.
Electronic Ignition Gas Furnace Problems & Troubleshooting – Gas furnaces are a very popular form of heat for homes and businesses and occasionally a gas furnace needs to be repaired because of a problem with the gas furnace commonly found in households. Since there are many different things it is difficult to cover every single possible gas furnace problem that can occur with a gas furnace in one article we are going to break this theme “gas furnace problems” down into series of articles with the first one being gas furnace problems with electronic ignition gas furnaces. There are different levels of problems that can occur with any gas furnace available on market. The most common failure is an electronic ignition failure which is our main focus. This is pretty common with gas furnaces. Knowing how to troubleshoot a furnace problem is key to solving the problem. Another common failure is a failure of electrical systems on a gas furnace because of fluctuations in power supply.
Both of those failures can be one in the same way. Consequently, that is an electronic ignition failure can be the result of an electrical failure in the system somewhere that can be cured.
And when I say electrical failure with a gas furnace problem I am talking of controls. Or wiring of the gas furnace. To break it all down we will begin it in a sequence of operation with a gas furnace. Furthermore, this is very important to understand if we are going to troubleshoot the electronic ignition gas furnace problem. Sequence of Operation – Electronic Ignition. Call for heat at the HVAC provider. The house is cold and the furnace needs to turn on to heat the house.
The thermostat is the first part in the sequence of operation for the gas furnace. The thermostat completes a basic circuit for heating the house.
This completion of the heating circuit in the gas furnace sequence of operation is a A signal for the gas furnace control board to put everything into motion. The induced draft or forced draft motor engages even Some furnaces have either a forced draft motor and others have an induced draft motor. It depends on the engineering of each. The difference being the forced draft blower blows air through the heat exchanger(s). The induced draft motor pulls air through the heat exchangers.
This checks the safety circuit to ensure all the safeties are closed as they should be closed. After safeties are confirmed to be good the control board sends a signal and starts the ignition process. Depending on the the source of ignition we will give a trial for ignition. You could have hot surface ignition, direct spark, intermittent pilot, or possibly some other type of ignition. See our article for electronic ignition gas furnace types. The trial for ignition includes a flame proving to ensure these.
In that case, with no flame, the furnace would create an explosion hazard and can be very dangerous. Most manufacturers use the flame rectification method to ensure the flame is burning.
Once the control board is satisfied that the flame is proven lit either it opens the main valve. The intermittent pilot ignites the main burners. In the case of direct ignition, the main burner is already lit and the heat exchanger is heating up. The heat exchanger is preparing for the next part of the gas furnace sequence of operation. The next step depends on the manufacturer of the control board. Blower control is either on a timer or a temperature sensor given.
This will control the time when the blower will be switched on. The reason for this is that the heat exchanger needs to warm up before the blower turns on and blows away all the heat. This is so that warm or hot air can be delivered throughout the supply ducts evenly. The next step in the gas furnace sequence of operation is the thermostat is satisfied and shutting everything down quickly. This happens with a small delay in the blower shutting down and stopping.
This allows heat to be dissipated from the heat exchanger. The burners shut off immediately once the thermostat is satisfied with the required heat. The blower continues usually on a timer or sometimes Thermostat.
There are some systems that do control the blower by the temperature in the heat exchanger. The blower shuts down and everything is off and waiting for the next time the thermostat calls for heat. Electronic Ignition Gas Furnace Problems & Troubleshooting Many things can happen in that furnace sequence of operation that can prevent the gas furnace from providing heat and dysfunction. Probably the first thing that can happen that will prevent the furnace from starting is the failure of the draft motor which has the main function. In that case, the power to the motor, which usually originates from the control board should be checked with a tester.
If that is okay then the motor itself needs to be checked to warm up before the blower turns on. This is so that warm or hot air can be delivered throughout the supply ducts evenly. The next step in the gas furnace sequence of operation is the thermostat is satisfied and shutting everything down properly. This happens with a small delay in the blower shutting down with a bit of delay.
Corrected before proceeding any further in the process of fixing the gas furnace problem, so that you don’t disturb any other part. Safety Switches are also included in Electronic Ignition Gas Furnace Problems. Another furnace problem to troubleshoot that is related to this is any one of the safety switches being open. The pressure switch is a safety switch. However other safety switches include limit switches that can trip anytime.
They trip either because the switch is faulty and needs to be replaced or because there is an indication of a problem. A problem that is causing too much heat to build up and causing the safety limit to open because it can harm the appliance. It opens to prevent damage from the excessive heat build up, or burning. All limit switches should be checked in order to check the event of a gas furnace problem with a limit switch. These were the few main problems we discussed and they are helpful enough for a person who has currently started experiencing problems with his furnace. I hope it brings help to every furnace owner.
