Gas Leaks at Furnace

Please disregard.

Your gas detector is an indirect testing instrument. It uses electronics, magic and silicon chips to make readings a skilled operator has to interpret.
A soap and water solution is what it is, leaks make bubbles when the solution is applied.

If you are getting 10% leaks with your tiff gas detector something is seriously wrong with either the gas fitters in your area or the way you are using your gas detector.

10 % does seem pretty high…