If you have a gas furnace, your system likely has an electronic ignition switch. Electronic ignition switch technology is a relatively new development. Electronic ignition switches provide a more reliable way to light your gas heating unit than with the standard pilot. However, if your electronic ignition switch fails, you may find that your heating system will not ignite and your home is left with no heat. If your heating unit will not ignite, there are a few troubleshooting steps you can take before you call an HVAC company for furnace repair.
Types of Electronic Ignition
There are two types of electronic ignition switches: the intermittent pilot and the hot surface ignition. The intermittent pilot implements an electric spark to light the pilot. The hot surface ignition switch uses an element, similar to those found inside light bulbs, to light the burner. These switches are generally found on higher efficiency heating systems. The hot surface ignition switch is most common in modern heating systems. The hot surface ignition switch has a life span of about three to five years. The cost of one of these switches is between $25 and $50. HVAC professionals recommend that if you have the hot surface ignition switch on your heating system, you should keep a spare switch on hand to make sure that you can quickly replace the part in case the switch fails at an inopportune time, such as in the middle of the night on the coldest night of the year.
Reasons for Hot Surface Ignition Switch Failure
The hot surface ignition switch may fail simply because the part has run its course. However, improperly handling the switch can make the part fail before its time. Also, if the current running to the switch is too high, this could make the switch fail prematurely, as well. Finally, dirty filters, as well as dust and dirt in the area around the switch can cause it to fail. A hot surface ignition switch is a fairly straightforward repair. Most homeowners will be able to replace the switch without assistance.
Faulty Control Board
A bad ignition switch is one reason the furnace fails to ignite, but there could be other reasons. The control board may be faulty and may need to be replaced. This part is not expensive and will cost the homeowner around $100 to $125. If you are a do-it-yourselfer, you may want to install the control board yourself. However, most Bryan TX homeowners will opt to have a furnace repair specialist perform the repair.
If any of the safety switches on your furnace fail, the ignition switch may fail to light the heating system. Again, these switches are inexpensive, but may require the expertise of a qualified furnace repair specialist to install them.
If your furnace will not ignite and you find yourself without heat for your home, call Malek Service. We offer 24 hour emergency service to customers in the Bryan TX area, and we will quickly and efficiently diagnose your heating system issue. We will ensure that your home is warm and cozy in the shortest time possible.