How to Clock a Natural Gas Meter: This is a video on how to calculate your gas Furnace input by using the customers natural gas meter and a clock to calculate the furnace input capacity and to verify manifold gas pressure settings.
How to Convert a gas furnace to LP & Check Gas Pressures: How convert a gas furnace to LP and check and adjust gas pressures on residential gas furnaces.
Code 16 Communication Fault: This video will walk you thru how to troubleshoot the communicating circuit.
Code 35 (gas valve fault)
Code 41 (blower motor fault)
Code 42 (inducer motor fault)
Gas Furnace Heat Exchanger inspection form DSB09-0022 HERE
Combustion Readings: This is general guidance of what should be expected when checking the combustion flue products.