How To Fix DSI FLT Light That Stays On (Explained)

The DSI FLT light is an essential part of the RV furnace and has to be assessed in greater detail to know what’s going on with the fixture.

It’s important to get a read on the light and make sure you are aware of what it’s letting you know. This is the only way to know what can be done about the light to get it to work the right way.

It starts by fixing the DSI FLT light that stays on.

If the DSI FLT light stays on, this means the flame sensor is malfunctioning or the air filter is clogged with debris. It’s also possible the wiring has come undone and/or the thermostat is not set to heat the RV. It’s best to look through each factor to see what is causing the light to remain on.

It’s easy to assume the DSI FLT light will turn off on its own but that is not always the case. It’s possible the light is going to remain on for as long as the RV furnace is running.

Don’t let this happen as the malfunction is going to cause issues with the rest of the RV.

This article is going to help shed light on how to fix the DSI FLT light that stays on and how to do it the right way.

Tips On How To Fix DSI FLT Light That Stays On

1. Inspect The Flame Sensor

It starts with the flame sensor.

There is a small sensor in the RV furnace that is going to have to run properly for the furnace to deliver appropriate results. If you are not looking into this, the furnace is not going to run as it needs to and this creates numerous other issues that are hard to manage.

You will want to take the time to look at the flame sensor in the RV furnace to see what’s going on and what can be done to fix it.

Look for potential debris on the sensor that is causing it to malfunction. If this is wiped away and cleaned, the flame sensor is going to start working as it needs to.

2. Look For Clogging In The Air Filter

You will also want to take a peek at the air filter.

The airflow has to be crisp or it is not going to let the RV furnace work. This is going to cause the DSI FLT light to turn on and then not turn off.

The best option in a situation such as this is to see why the air filter is clogging and how it can be fixed moving forward.

As long as you are doing this and removing the debris from the air filter, it is going to start working properly. This is going to help with the airflow and that is how the RV furnace is going to work as you need it to.

3. Inspect The Wiring

The wiring is an integral part of the RV furnace.

You have to make sure to look at each wire and then see where its connection point is. The reason you are going to do this is to get a proper look at where the wiring is starting and how it can be fixed to control things moving forward.

Sometimes, the wire is loose and that is the main issue you are going to face.

Other times, the wiring is going to be damaged and it will have to be replaced. Take your time to see what’s going on and then determine what the right option is moving forward.

4. Ensure The Thermostat Is Set Properly

You will want to assess the thermostat in the RV furnace.

This can start to misbehave and malfunction, which is why the light stays on. You are going to need to take a look at whether or not the thermostat is heating in the right mode.

There is a set mode that has to be turned on with the thermostat. You will need to see if it is on. If not, this is the problem.

Turn it on and the light will go away immediately.

Final Thoughts

Look into these details as you figure out how to fix a DSI FLT light that stays on.

If the DSI FLT light stays on, it’s likely due to debris in the air filter or the wiring being loose. It’s also recommended to check the sensor for debris and clean it right away. In some cases, the thermostat’s settings will need to be adjusted to turn on the heat.

It’s important to work your way through these settings with an RV furnace. Otherwise, the RV furnace is not going to run at the level you need it to and this light is going to stay on.

Don’t let this happen and work your way through the issues that are in front of you.