Hi All.

I have a Carrier furnace, 1985, model #58SSB080-BC. It appears to have an electronic ignition.

I feel like the outlet pressure is too high. It makes quite a roar when it comes on and my heating bills are $200 per month. I feel like there is a lot of waste heat going up the flue which is not captured by the heat exchanger.

My question is can the gas pressure be turned down?

The furnace has a valve which allows the inlet and outlet pressure to be adjusted. It has min and max pressures printed on the label. It also has a high and low setting of some sort.

Or, would the burner orifices need to be changed?