Try opening tap further or turn another tap on as well clean filter on hws and clean water restrictors in shower head and taps if water is isolated and safe to do so.
Cleaning rinnai gas heaters.
Shut off the main gas or turn off the circuit breaker for electrical devices.
If all the odourant is not burned there would be a kerosene type smell.
This prevents cold water from flowing into the water heater and hot water from coming out during the cleaning process.
2 get a vacuum with a hose and preferably a brush on the end of the hose.
Rinnai gas heater service rinnai heater service and gas heater repair involves cleaning of filters cleaning of flues on flued heater models cleaning of the burner and checking pressure in addition to other procedures as required by the specific model including portable gas heater service.
Gas heater rinnai convector 417 customer s operating information and installation instructions unflued room heater 17 pages gas heater rinnai compact 2 operation manual.
Check gas supply turn gas stove top on then turn hot water tap on.
Having a portable gas room heater that is working to the proper manufacturers specifications is the best practice and there are a few things that can be done.
Turn off the power source for your tankless water heater.
Wipe the exterior of the ventless gas heater with the cloth to remove dust and dirt.
Since natural gas doesn t have an odour there is an additive called mercaptan so that if there is a leak there will be a smell.
I would suggest having a professional adjust the settings to be sure that all the fuel is being combusted and also a carbon.
It is likely that the cleaning is not enough to solve the problem.
Most heaters have 2 screws at the bottom but some have more in different places.
Close turn off the three water valves attached to your tankless water heater.
If flame drops on stove this shows it is possibly a gas supply issue is there enough water flowing.