Test Meter Microamps Function

About this HVAC Tip

  •  Furnace
Ever wonder how you can use a test meter’s microamp function when troubleshooting a gas furnace in the field?

Because furnaces today use hot surface ignition, you need to be able to test the flame signal strength that the circuit control board is picking up to rectify flame. In this tip, Dana Clark will show you how to hook up and use your test meter (set to the microamp function) to measure the flame signal strength of a modern gas furnace.

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