Your thermostat controls may be set incorrectly try turning the thermostat off and then on again.
Trane xv90 pressure switch replacement.
Your filters may be clogged or dirty clean or replace the filters.
I have a 16 year old trane xv90.
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Swt2522 trane pressure switch see the list of 10 trane american standard and cumberland furnaces that use this below.
Connect the ohm meter to the pressure switch.
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When the system calls for heat and the inducer fan begins to run check each pressure switch terminal.
If the ohm meter comes back with an open line reading the switch is bad and needs replaced.
Check all incoming and outgoing vents on the furnace air system including on the furnace and clear away anything that may be blocking the air flow.
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Reset to the desired temperature and see if that helps.
The ohm meter should read very close to zero.
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Consult your local trane comfort specialist if you are unsure where the filters are located.
Both have variable speed blower.
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Then reset the furnace.
A pressure switch is designed to sense the negative pressure created by the draft inducer motor during the furnace startup and to shut down the furnace ignition if the air pressure is inadequate.
If i were to replace this with a new trane model would it be the xv95 or the s9v2 that would be the comparable unit.
The pressure switch on a furnace may fail or get stuck in an open position and there are few simple checks you can complete before testing the switch.
Swt2523 trane pressure switch see the list of 44 trane american.
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I noticed in the trane literature that the xv95 has a variable speed inducer like my current xv90 but the s9v2 has a 2 speed inducer.
Three flashes on the trane furnace control board means that the vent pressure is too high or too low which then activates the pressure switch and causes a lockout.
