in , , ,

What You Need To Know About What Gas Pressure A Propane Furnace Should Have?

What You Need To Know About What Gas Pressure A Propane Furnace Should Have?

To get the most out of your propane furnace, use the proper pressure setting. If you simply allow it to flow directly from the gas supply station to your tank’s combustion chamber without adjusting the gas pressure, your gas furnace will not work as efficiently as it should. Furthermore, the incorrect gas pressure setting will cause your furnace to be unable to reach your desired temperature in certain areas of your home, eventually leading to a breakdown. So, what is the best setting for gas pressure? We investigated to find an answer for you!

The ideal manifold pressure ranges from 3.2″WC to 3.7″WC.

In the case of two-stage burners:

  • For High Fire, it should be 9.7″WC to 10.3″WC.
  • Low Fire should be 6.7″WC to 7.3″WC.

When your propane furnace is consistently operated with the incorrect settings, it can cause serious maintenance issues, which is why it is critical that you know the proper pressure setting on your gas tank. Here is some helpful information on how to keep your gas tank running efficiently to keep your home properly heated for a long time.

How Do You Check Propane Furnace Gas Pressure?

What You Need To Know About What Gas Pressure A Propane Furnace Should Have?

Follow these simple preliminary tests to see if you have enough gas pressure in your propane tank:

  • Examine all of your gas-powered appliances. If they work, you should have enough gas. The only thing left to check is whether your propane tanks are operating at the proper pressure.
  • Examine your water heater’s light indicator. If it’s turned on, you’re good to go.
  • Start your stove. Gas will enter if the burners ignite.
  • Check to see if you have any hot water left.

A dependable electronic manometer is required to accurately measure the pressure in your gas furnace. There are manometers that can provide accurate readings of negative and positive pressure.

Before starting the furnace, connect the manometer to the gas valve so you have a reference point if you need to adjust the pressure.

The manometer can be attached to most propane tanks in two places. The first location is on the hex screw installed at the valve’s tower. Simply turn the hex screw slightly and install the manometer hose at the top of the tower. The second location is the MPT plug, which can be found at the valve’s outlet.

How Do You Adjust A Propane Furnace’s Gas Valve?

What You Need To Know About What Gas Pressure A Propane Furnace Should Have?

Before you begin, always ensure that the furnace is turned “Off.” Here are the steps to take after the furnace has been turned off.

You Will Require The Following Items:

  • Tape for a plumber (vinyl)
  • Wrench with an open end
  • Owner’s guide
  • Manometer

How To Adjust A Gas Valve:

  • When adjusting the propane furnace pressure, it is critical to always refer to the manufacturer’s manual. To achieve the recommended gas pressure, turn the propane regulator knob.
  • Examine the furnace meter box and the gauge for current pressure. If the pressure is too high, slowly turn the knob clockwise and check the pressure again. Simply turn the knob counterclockwise to increase the pressure.
  • When you’ve reached the desired pressure, remove the manometer from the valve, cover the opening with plumber’s tape, and tighten the screw with a wrench.

What Happens If A Furnace’s Gas Pressure Is Too High?

It is normal for propane tank pressure to gradually rise. When your tank is over-pressurized, however, various components can be severely damaged. When left unattended for an extended period of time, it can cause carbon monoxide poisoning as well as a disastrous explosion.

You must be aware of the numerous warning signs of a propane tank overheating. Among them are the following:

  • A burning odor that persists after 30 minutes
  • A strange humming sound can be heard.
  • Even before completing a cycle, the propane furnace shuts down automatically.

What Happens If A Furnace’s Gas Pressure Is Too Low?

Low propane furnace pressure, on the other hand, can cause a slew of problems in your heating system. For starters, it may result in insufficient heating in certain areas of your home. Alternatively, no hot water at all.

Condensation will form inside your heating system over time, causing corrosion. This will necessitate the untimely and costly replacement of some of your heating system’s key components, if not the entire system.

The Importance Of Having Your Propane Tanks Inspected On A Regular Basis

What You Need To Know About What Gas Pressure A Propane Furnace Should Have?

The pressure settings on your propane tank can mean the difference between comfortable warmth and the cold and expensive cost of replacing your heating system. This is true for both your home and your business.

According to the information we gathered from various sources, excessive propane tank heat can result in valve failures. Too little pressure, on the other hand, can lead to corrosion and costly repairs.

There is also dust buildup in the ducts and air filters. Uncleaned or clogged filters can reduce the heating capacity of your propane furnace. Your heating system will run smoothly if it is cleaned and maintained on a regular basis by a professional propane furnace expert.


Regular maintenance usually entails a thorough inspection of all the working parts of your furnace, particularly those that tend to wear out faster, such as the heat exchanger, pilot light, and fan. By having them serviced, you can avoid future costly problems and keep your heating system running at peak efficiency.

What You Need To Know About What Gas Pressure A Propane Furnace Should Have?

What do you think?

Written by HVAC Contributor

Leave a Reply

Your email address will not be published. Required fields are marked *

GIPHY App Key not set. Please check settings

How To Operate A Heat Storm Heater

How To Operate A Heat Storm Heater

Is It Safe To Be In A House During A Radon Test?

Is It Safe To Be In A House During A Radon Test?