Trane Furnace Diagnostic Codes
The furnace is flashing some sort of diagnostic code. This can be very overwhelming to many people as the codes mean problems. Problems require solutions, especially if the customer wants to continue to heat the house, and at-home solutions are sometimes hard to come by.
Repairmen tend to be very expensive, so most should try to identify the code and troubleshoot the problem themselves before calling a repairman.
Trane furnace diagnostic codes may look like a foreign language, but it is usually very easy to understand the code and what it means.
The first step is to locate the code online, in the manual, or by calling Trane. The code information will explain what the code means, what is wrong with the furnace, and how to repair the unit.
After noticing the problem, it is usually not a good idea to restart the unit. Restarting the furnace will erase the memory and the homeowner will have to wait for the problem to happen and code to flash again.
Trane furnace codes appear in a series of flashes. Typically, the homeowner will notice something is not working properly with the furnace and should then go look for the flashes.
Upon viewing the unit, they will be presented with one, or maybe a few, different types of solid or flashing lights. The basic flashing codes are as follows:
2 flashes-System lock out.
3 flashes-Pressure switch stuck open or closed.
4 flashes-Open high temperature limit switch.
5 flashes-Flame sensed without gas valve.
6 flashes-115 volt polarity reversed.
7 flashes-Gas valve circuit error.
8 flashes-Low mili-volt signal at flame sensing rod.
9 Flashes Check igniter circuit and line “N” to 24 VAC Common voltage ( < 2 volts) for a possible grounding problem.
Homeowners dealing with a furnace with a Trane furnace diagnostic code flashing light can enter the code online or read the unit manual for troubleshooting tips. Another option is to call Trane and speak with a representative about the code and how to properly address the issue.
There are four additional light signals the LED furnace bulb will give the homeowner to indicate a problem or if the furnace is properly working.
If the light is flashing slowly, everything is working normal and there is no call for heat. If flashing fast, everything is working normal and there is a call from the thermostat for heat.
If the light is continuously lit, the control board is bad and needs to be replaced for the unit to work properly again. If the light is continuously off, check the power source and that the unit is turned on.
After some research, Trane diagnostic codes are not hard to understand.
Once the homeowner has accurately identified the number of flashes, therefore getting the code, they should look it up to be certain what is wrong with the unit.
At this point, if the problem is not an easy DIY fix, it is suggested that the unit be unplugged from the wall and a repairman called.
Identifying the code and problem before calling a repairman will save the homeowner some money on the repair call since the repairman will not have to spend time waiting for the code to flash again.
Our furnace does not seem to be blowing air through the vents, is omitting a burning smell and is giving a 4 flashes-Open high temperature limit switch code. We have turned off the heat for now but it is getting very cold. We left a message for a servicer but are wondering if we need to have an emergency call or if we can turn the furnace back on for a day until the servicer can get here. Please advise.