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Gas pressure and temp rise for high and low fire on furnace

3.8K views 9 replies 6 participants last post by  rundawg  
#1 ·
I'm a home owner trying to educate myself on the correct operation of a dual stage furnace. I have my installer coming soon to check this issue but I want to be prepared.

My newly installed furnace blows luke warm air compared to my old furnace. I've read the gas pressure can be adjusted for low and high fire. I know for a fact this was not done during the install because it was in the summer months.

My furnace says it has a temp rise of 30-60 degrees. I measure the temp rise with a thermometer and I'm on the low end at 30.

Am I correct that the has pressure can just be adjusted to raise the temp rise closer to the middle, say 45 degrees? Should the temp rise be the same on low and high fire?

Thank you
 
#3 ·
^^^
I 2nd what he says. Gas pressures should be listed on the same label you got the rise from. Generally the rise is close for low and high fire but before the air is adjusted the gas needs to be set. If the tech is trained in proper use of the CA he will know how to adjust the furnace so it is not only safe but max efficiency.
 
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