Water is flowing, but there is no hot water coming out:
Ensure that you have the incoming water supply and the outgoing water supply hooked up properly. Your water supply should be attached to your incoming connection (located on the far right) and the shower head should be attached to the outgoing water (located as the center connection).
Ensure that you have adequate water pressure of at least 20 PSI, sustained.
Ensure that you have adequate gas in your propane bottle and that the LP regulator is threaded all of the way on to the portable tankless water heater.
Fresh batteries are required for ignition spark. Make sure batteries are aligned in the proper polarity (+/-)
If you are still having troubles or are on a modified water system, please visit our helpdesk located at www.eccotemp.com for additional troubleshooting steps.