Troubleshooting A Fogatti Tankless Water Heater That Turns On But Won't Ignite

Question:

I have a fogatti fso61b that wont attempt to light the gas. When I turn it on it makes sound as if a switch is clicking on but no other sounds as if it is trying to start to ignite the gas. The control panel appears to work correctly but running a hot water tap does not turn on the unit. I have tried to determine if there is 12v power but I can not find a bare wire to connect my volt meter to. I have tried to disconnect the plastic connections past the switch but I can not get them apart. How would I expose something to test the power input or what else might be the reason my unit will not attempt to ignite the gas?

asked by: Richard F

Expert Reply:

You wouldn't find exposed wire to test the voltage on the Fogatti RV Tankless Water Heater # LSB64FR, and would instead just poke into the wire casing with your test lead and then cover the hole with some electrical tape after you're done. If the control panel/thermostat is powering on then the issue is most likely with your gas pressure being too low. These units can some times have a cap on the gas inlet that allows you to still thread on your gas line with the cap in place. You'll want to first ensure the cap is removed so gas can flow into the unit.

From there you'd want to have a qualified technician check the gas pressure and ensure that the unit is actually receiving 11" WC. If not then your regulator needs either be cleaned or replaced. If it needs to be replaced then we have the following replacement options depending on your regulator style:

Dual Tank # 37207-31525
Vertical # 108220
Horizontal # 108221