If your Eccotemp L5 / L7 comes on for a small amount of time and then shuts off, please review the following troubleshooting guide.
1. Check your propane tank to determine if you are out of gas. Make sure the valve is completely opened up.
2. Check your batteries to see if they are properly installed. If your batteries are not new, try another set. When checking the batteries, if you encounter corrosion, gently clean the connections with a wire brush and install a fresh set. Be careful when doing this as battery acid is extremely harmful and poisonous.
3. Disconnect the incoming water line. There is a screen immediately inside of the incoming water pipe that may have clogged over time and is reducing the water flow and water pressure.
4. After following these steps, test to see if the water heater is working.
5. If you are running your L5 / L7 with something other than the shower head connected to the outgoing water line, such as plumbing, disconnect this and try to operate the water heater to determine if your plumbing is the issue.
You need to have a minimum of 20 pounds per square inch of water pressure to activate and sustain operation of the L5 / L7 water heater. If you cannot achieve and maintain adequate water pressure, your water heater will function erratically or not at all.