Question about Heating & Cooling
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Posted on Jan 02, 2017
I had the same problem with this unit and had the heater serviced which fixed the problem. The problem is caused by the pilot flame not being big enough to keep the thermocouple hot, so the heater thinks the flame is out and it turns the gas off! The thermocouple is effectively a switch that is on when hot and off when cold. The pilot flame is supposed to keep it hot, so its on and the main burner will get gas. When its off (ie cold) gas is blocked from the main burner for safety reasons! This manual is for a very similar heater: http://www.rinnaisales.co.nz/tradesmart/rinnai2/pdfs/service_info/171.pdf
You need to get at the pilot and clean it out!
Posted on Jul 14, 2009
SOURCE: My Rinnai 650 Cosyglow Natural
This heater has a safety valve on the power on/main gas valve button: after the burner is lit you must keep the button pressed for about 10 seconds to allow a sensor to heat up and trigger the thermostat to keep the valve open. This safety has been implemented that if in case the flame dies out the gas doesn't keeps escaping, putting you and your house in danger.
If after 10 seconds when you take your finger off the button the flame dies out it means that the safety thermostat has failed and it will have to be replaced. Because it's a gas run device i strongly suggest you call a professional for that - the repair will cost you roughly $200.
Posted on May 12, 2011
SOURCE: does not want to start
Intermittent faults on these units are very very rare; they either work or they dont! Ive had similar reports that ended up being more of a gas regulator fault (thats the hunk of metal that the small copper tubes from the cylinders are connected to). Do you have any other applainces on gas. When the heater doesnt work try the others'; if they work keep thenm going and then go back and try the heater. Does the heater try and ignite? I also like to recomend getting these heaters serviced occasionally. Just like cars, intermittent faults can be a reminder to get a good service done.
Posted on Jul 21, 2010
I had this same problem last year and went through all the checklist in poshpoms suggestions ( I am on mains Gas ). The issue was caused by the Flame rods. Near the 2 pilots at the front and the back. Those small rods each that 'senses' the flame become inadequate, so they were replaced with a new pilot assembly from Rinnai that had longer rods and better coverage. Issue was fixed. Good Luck.
Posted on Sep 09, 2010
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