I have a problem with my 3 year old gas furnace.
Last Sunday I smelled natural gas outside my house and found the smell coming from the PVC furnace exhaust pipe on the side of my house. The gas company responded and said the furnace had to be tweaked. My HVAC contractor came the next day and diagnosed the problem as an abrupt drop of pressure from the gas pipe when the furnace went into its second stage of ignition.
When the furnace comes on it initially produces a steady flame but the pressure drops from a 7.5” at 1st stage start up and drops below .5 90 seconds later when the furnace burner goes into its second stage. The HVAC contractor said the problem was the gas meter.
A gas company rep came back and tested the meter reporting that the gas meter was delivering a steady 7.5 pressure reading and that the problem likely lies in the gas pipe from the meter to the furnace in my basement.
The gas piping from my gas meter comes into my house in a straight 10 foot run to my gas furnace
Two feet from the exterior wall entry the black pipe has a t connection with a run to a gas dryer.
The gas dryer works fine but the 3 year old gas furnace has a supply problem.
Is it possible that an obstruction suddenly occurred in the black pipe after three decades?
Has anybody familiar with gas piping ever heard of a gas pipe obstruction that could cause such a pressure loss.
So long story short the gas company is saying my pipe is at fault and my contractor is pointing the finger at the gas meter.
I am concerned because the furnace will be needed soon and am uncertain as to how to proceed with my HVAC contractor and the gas company blaming each other.
Any suggestions on what is causing this problem or any testing or work needed would be greatly appreciated
Last Sunday I smelled natural gas outside my house and found the smell coming from the PVC furnace exhaust pipe on the side of my house. The gas company responded and said the furnace had to be tweaked. My HVAC contractor came the next day and diagnosed the problem as an abrupt drop of pressure from the gas pipe when the furnace went into its second stage of ignition.
When the furnace comes on it initially produces a steady flame but the pressure drops from a 7.5” at 1st stage start up and drops below .5 90 seconds later when the furnace burner goes into its second stage. The HVAC contractor said the problem was the gas meter.
A gas company rep came back and tested the meter reporting that the gas meter was delivering a steady 7.5 pressure reading and that the problem likely lies in the gas pipe from the meter to the furnace in my basement.
The gas piping from my gas meter comes into my house in a straight 10 foot run to my gas furnace
Two feet from the exterior wall entry the black pipe has a t connection with a run to a gas dryer.
The gas dryer works fine but the 3 year old gas furnace has a supply problem.
Is it possible that an obstruction suddenly occurred in the black pipe after three decades?
Has anybody familiar with gas piping ever heard of a gas pipe obstruction that could cause such a pressure loss.
So long story short the gas company is saying my pipe is at fault and my contractor is pointing the finger at the gas meter.
I am concerned because the furnace will be needed soon and am uncertain as to how to proceed with my HVAC contractor and the gas company blaming each other.
Any suggestions on what is causing this problem or any testing or work needed would be greatly appreciated
