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Can't get hot water heater to work - Rinnai Infinity 18

Hi there - we just moved into a rental property and have no hot water. We have a Rinnai Infinity 18 mounted on the wall outside the 1st floor (quite hard to access). When we turn on the hot water tap, we hear the pilot trying to light, and a fan going, and we have turned the gas inlet valve and the water valve to the on/open position (both at the meter, and locally at the Rinnai). The control panel in the bathroom has the temperature we want on it - but after running the water for a bit, it changes to the cold temperature (11 or 12) and flashes. Yesterday the 'in use' light illuminated, though it still didn't work - today, it doesn't even illuminate! The unit seems to have power, water and gas... but we still don't have hot water. The gas cooktop inside the house is working, and the lights and water are, too.
What else can we try? I'm sure the last renters here had hot water, so I'm certain what silly thing we're missing?? Thanks very much for your help!

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If you can get to the gas valve make sure it is in the on position and not in pilot or off. Does it sound like
a spark ignition system? Even though you say the gas valve is on, by code thered should be a gas shutoff valve located within site of the unit. Follow the
gas pipe until you find such a valve and make sure its on

Posted on Feb 07, 2010

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Posted on Jan 02, 2017

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