Can you vent the Rinnai 551F vertically through ceiling?

rwandih - Are you sure you listed the correct model number. As the RHFE series heaters a Direct Vent models, not "Ductless". Please advise, so the I can forward you the correct Owner's Manual.

Thanks

Hi! Go here to see Rinnai 551F service manual http://www.rinnaisales.co.nz/tradesmart/rinnai2/pdfs/service_info/230.pdf. Also go here for additional information on your product http://www.rinnaisales.co.nz/tradesmart/rinnai2/pdfs/installations/230.pdf Thank you for using fixya! I hope I had helped you with your problem! May you have a good day!

clean all vents and filters

Because of condensation, ice forms outside the exterior exhaust vent.

Try this link http://www.rinnai.us/documentation/downloads/Owners_Manual_1001-551.pdf

http://www.rinnaisales.co.nz/tradesmart/products/show_sub_cats.asp?type=oper&dum=1&z=&cat=space&subcat=energy&subcatname=Energy+Saver&i=&test=

The above should take you to the link.
otherwise www.rinnai.co.nz naviagte to tradesmart, its in there

Hebert,

Is there a chance there is a draft around the room temp probe? It is down low on the right side of the heater. If there is a draft the room sensor is fooled and keeps running the unit. You should be able to prove the room sensor by putting your hand over it after the stove has been running for a while. This should shut the stove down. If not there is a problem with the room sensor.

Tom Hawkins
[email protected]

It is time to replace it. You cannot get some components like the main board.

Hi I did not find the complete service manual for your model, however here is a good extract from service manual with most important information