Recreational Vehicle (RV) Technician Practice Test

What is the first step a technician should take if a float type 80% overfilling prevention device does not seem to be accepting propane?

1. Check the gas pressure

2. Check the valve for correct position

3. Inspect the propane cylinder for damage

4. Replace the device entirely

The correct answer is: Check the valve for correct position

When a float type overfilling prevention device is not accepting propane, the first step a technician should take is to check the valve for correct position. This step is crucial because the valve's position directly affects the flow of propane into the device. If the valve is not properly aligned or is in the wrong position, it may prevent the device from functioning correctly, leading to issues with propane filling. Confirming that the valve is in the correct position allows the technician to ensure that the entire system operates as intended. If the valve is positioned correctly, it may lead to further investigation, but adjusting the valve is typically the most immediate and straightforward step to diagnose the problem. Considering the other options, checking the gas pressure may be important later on, but it is not the immediate next step regarding the float type device specifically. Inspecting the propane cylinder for damage may need to happen if other problems persist, and replacing the device entirely should really be a last resort after ensuring that simpler solutions such as adjusting the valve have been explored.