Tray full light stays on - FoodSaver V3880 Vacuum Sealer - The Master Chef Kit

If the water empty light is staying on when the water tank is full in your Polti Pro95 steam cleaner, it could be due to a malfunctioning float valve or a faulty water level sensor.
Here are some steps you can take to troubleshoot the issue:

1. Check the float valve: The float valve is responsible for regulating the water level in the steam cleaner. If it is stuck or malfunctioning, it could be causing the water empty light to stay on. To check the float valve, remove the water tank from the steam cleaner and inspect the valve for any signs of damage or blockages. If the valve is damaged or blocked, replace it.
2. Check the water level sensor: The water level sensor is located inside the steam cleaner and is responsible for detecting the water level in the tank. If it is malfunctioning or faulty, it could be causing the water empty light to stay on. To check the water level sensor, you will need to disassemble the steam cleaner and inspect the sensor for any signs of damage or wear. If the sensor is damaged or worn out, replace it.
3. Check the wiring: If the float valve and water level sensor are functioning properly, the issue may be with the wiring. Check the wiring between the sensor, float valve, and control board for any signs of damage or wear. If you notice any issues, repair or replace the wiring as needed.

If you are not comfortable performing these troubleshooting steps, it is recommended to take your Polti Pro95 steam cleaner to a certified repair technician for further diagnosis and repair.

Since you did not post the model: http://hoover.com/support/

That can mean the bag is full.

it comes up from the back,it is probably plugged or the sensor is dirty

Hair dryer. Remove both tray inserts and dry thoroughly, paying special attention to the sensor area in the center of the upper tray.

The problem was a sticking switch that was not being reset. The vacuum on/off switch mechanism is comprised of two switches. One is the main switch that turns the vacuum on and off. The second is a shut off switch that gets tripped when the full bag sensor is engaged. This second switch is supposed to get reset when you push the on/off switch on the outside of the machine. The full bag shutoff switch was stiff and it, therefore, was taking a couple of presses of the on/off switch to move the shutoff switch back into the running position.

The dial regulating suction does not seam to work the vacuum works constantly on the full power and the light indicating overheating stays on.
I would advise you to ALWAYS to FIRST UNPLUG YOUR VACUUM before beginning any service procedure.
This would depend on the brand and model number you have – without knowing the model or brand of vacuum you have it would be hard to give an accurate answer – the over heating light could indicate some type of clog or blockage and may have nothing to do with the dial to regulate the suction – that merely is a height adjustment …. As this does happen to most vacuums that the overheating light comes on – if there is no problem have it looked at from your local vacuum dealer or repair shop would be the best advice that I could give you.

Most likely the hose or the inlet down by the brush roll has a clog in it. The red light indicates a full bag, but if there is a clog, then it thinks it has a full bag.