Trane Furnace System Lockout

Most furnace lock outs are caused by problems with igniters flame sensors and limit switches.

Trane furnace system lockout.

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. This condition is known as lock out. It then went into lockout. Then reset the furnace.

If one of the sensors reports an unsafe condition the furnace controller shuts off fuel and power to prevent unsafe operation. After 2 weeks of working well the furnace started having the same lock out issues after 3 attempts to light. Unfortunately this year i am on my own and don t know what to do. We also do not have an outside air source however we always keep the laundry room door open for better airflow.

Your furnace normally will remain in the locked out state until you manually reset it. 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. The system did the same thing tried twice to turn on but we still do not have 24v at the red and gray wires going into the top of the gas control. I ignites about six.

Gas and oil home heating furnaces trane xl 80 system lockout. The furnace will go into lockout sometime in the next 24 hours. At least now i have a way to reset the lockout. At least the instructions with the new board are a little better than what i had with the first one.

My trane furnace is flashing the 2 red light system lockout code. All furnaces need to have adequate ventilation and a dirty air filter can cause a system lockout to occur. When i try to start up the system it shows normal heat call on the circuit board. For example a clogged air filter may prevent an adequate supply of air from entering the system s cold air return that causes the heat exchanger limit switch to trip.

It does this every year. After about 1 3 minutes the fan motor begins to run and delivers heat through the duct system. The remedy to this problem is simple replace the air filter.