20 Most Recent Rinnai RHFE-431FAIII 16,700 BTU Direct Vent Furnace Energy Saver Heater - Natural Gas - Page 8 Questions & Answers

Verify no lines to vaccine switch is kinked or unplugged.check YouTube.

Turn it off now get some out to clean it and to find out why it is sooting up.

check / replace the thermostat

is it a vented unit? sounds like if it is, the exhaust or intake is blocked which is causing a high limit to open until it cools

It likely needs maintenance. If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79

Is is propane or natural gas? If it is propane, i would check the supply pressure.

Yes you can replace this part you just need the part number . To order it .

Hi there, i have same unit and its got error 70 coming up. Which is faulty on off switch as per manual. I can confirm on off button on control panel, up on top is not working however remote is working. When i try to start it with remote it comes up but turns itself off with error 70 again. I tried to remove this control panel (pcb) from unit however it is still doing same. Now i am not sure if it is actually pcb panel which is faulty ? Please help ;)