When i unplug my rinnai heater does that turn off the pilot light?

Question edited to add full name of heater and full model number in correct formatting..
Question moved from Cars and Trucks category to Rinnai.

Here is the Thermocouple, pilot light assembly

https://eastwaysales.com/products/pilot-assembly-2?variant=31568538796090

https://www.google.com/search?q=thermocouple+for+RINNAI+UNVENTED+GAS+Heater+Model+No-REH-18T-P

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

Contact rinnai support ,make sure the pilot sensor is sitting in the flame,& i hope you did not over tighten it when installing it also lightly sand the end that screws in.

When the gas was turned OFF, air got in the line(s) and created an air pocket. This air will need to purged from the system, before the heater will light. It only the shutoff valve on the gas line to the heater was turned OFF, it will be easier to purge. If your Rinnai heater has manual ignition rather than electronic ignition. Holding the control down in the Pilot position, will eventually purge the air. If you have electronic ignition, continually trying to light the unit will do the same thing, but take longer to accomplish. Consulting your Rinnai will also help you with this situation.

Hope this helps you and thanks for choosing FixYa.

the heater needs service /cleaning along with the pilot to findout why this carbons up

clean whit sandpaper the tip of sparker,try to adjust the distance from the electrod and the gas nosel.

found that the pilot tube had dust bunnys in mine so blew it out with a air can i had for the computer now the pilot light stays on just fine

The thermocouple has gone bad.The thermocouple needs to be directly in the pilot flame.When the thermocouple goes out,the flame most of the time will have burned the thermocouple tip a way.If it was not for this devise,the gas would exscape,and fill the home up.This is a safety feature.

If you smell gas in a Rinnai you have a big issue. This heater is what is called a direct vent heater with an electronic ignition so the combustion chamber is sealed and the smell of gas is an indication that you have a gas leak. Please call a professional today.

Check regulator on the unit.
Check pilot unit on the heater
use soapy water to check for leaks if see bubbles turn off main gas supply valve.
always turn off gas supply before any checks or repairs are made
when all else failes call your local gas provider to check heater and gas supply