Client stated furnace is non operational -Filter is clean -Furnace does have incoming power, also low voltage power to gas valve -The gas valve itself is energized yet is not releasing gas to be ignited -The blower motor is also reading out of range resistance -The furnace is 44 years old, I reiterated that the heat exchanger has a high probably of being cracked as it has been expanding and contracting constantly for that long -It is likely unsafe to run the furnace in this condition, I provided options to replace heat exchanger, client is aware it may be difficult to find a replacement for a furnace of this age -Field supervisor will be giving Christopher a call to go over all options