Trane Gas Furnace Pressure Switch Error

Inspect the hose s connected to the pressure switch to make sure it is connected at both ends and is in good condition.

Trane gas furnace pressure switch error.

Then three service calls a limit sensor a pressure switch a blower motor. Inspect the pressure switch hose. And about 400 later the problem still existed. One potential error is a furnace lockout which is not something that every furnace user knows about.

If the hose is cracked replace it. It should be clear. Also the fittings that the tubing fit into should be clear. Other problems that could cause the pressure switch to not open are a dirty blower wheel on the inducer.

Trane xr 90 gas furnace that is coming up with three flashing led lights saying that its the pressure switch witch was replaced last spring the vents are open whats my next move read more rick. The pressure switch is an indicator of pressure problems in the furnace. The sensor closes when the furnace kicks in and allows heat to enter into the home. Let me clarify the bottom side of the pressure switch is the intake that has a small white flexible hose attached to it that runs down into air intake area.

This error code remains flashing through the next cycle until the moment that the furnace should activate then disengages and errors out again. The pressure switch fitting may have a restrictor inside do not remove. There s a motor engaging but after 5 speed ups the system disengages with the 3 flash error code for the inducer fan or pressure switch. Check the tubing from the inducer.

When a pressure switch error occurs the system will shut down and no warm air will enter the home. A pressure switch senses pressure within the flue system. The exhaust side of the pressure switch actually splits into two hoses. A pressure switch error on a trane furnace may lead to a very cold home if not corrected in a timely manner.

One goes to the gas valve and the other one goes to the bottom of the furnace where the burners are. Some other things that cause furnace pressure switch problems are. Remove the main access panel on the front of the furnace. This is for anyone experiencing pressure sensor limit switch issues with the xr series trane furnaces i went the end of one winter seasons and the beginning of the next trying to resolve this issue.