Breadcrumb Home/ Interplay Learning - Gas Furnace Troubleshooting/ Gas Furnace Troubleshooting Gas Furnace Troubleshooting Duration 6 hours 0 minutes Language English Learn to troubleshoot a typical residential gas furnace (80% mid efficiency) surrounding over 20 life like service calls surrounding burners, safety switches and motor operations. Back to Course Title Interplay Learning - Gas Furnace Troubleshooting