I just had this Valor g4 installed yesterday. First of all, when I use the remote to turn it on, does the setting have to be in "temp" position on the remote?

Go to page 15 of the Valor H Series user manual. It shows where the pilot is located.

https://valorfireplaces.com/media/Generic%20Title%20PDF%20manuals/English/650IL-IR%20English%20manual.pdf

go to system setup see aquapure turn chlorine production 5% or more and you should see it on the menu

Friend! All thermostat is calibrated to cut in and cut off at the end of - or + 1 degree end.
Example: If you set 23 degree, it will cut off in 21 degree and cut in @25 degree. So accordingly you set the temp.
Secondly, don't set temp near to your room temp.Minimum difference should be 3 degree. If your room temp 12 degree, set at least 15 degree for heat and if room temp 28, set at least 25 degree for cool.
Hope it's helpful?

You should be able to download the installer instructions on

Valors website, the information can be found here

under Trade then installer guides

www.valor.co.uk

alternatively new Valor Gas Fires

What type of system do you have, Heat pumps have an AUX setting if that not comming on depending on where you live it may not keep up on its own. A gas furnace should give no trobble check you normal stuff like the filter and it is not on a program and changing over around the time you check it.

The manual says:
http://www.coinwash.com/temp/rinnai.pdf

"For the name of the Authorized Distributor or Installer nearest you, please contact your local HVAC dealer or gas service technician, visit the Rinnai website (www.rinnai.us), call Rinnai at1-800-621-9419 or write to Rinnai, 103 International Drive, Peachtree City, Georgia 30269"

Manual says that the remote is for setting temperature.
When you turn on hot water spigot, tankless water heater will heat the water to the set point temperature.
If water heater is not set up to use remote, then tankless unit will heat to 140 degrees F.
"With the MCC-45-4US remote control installed the water temperature is adjustable from 96
to 180°F. The water temperature cannot be set to a temperature other than 140°F
without the use of the MCC-45-4US remote control unit. If you require a temperature
other than 140°F you must install the MCC-45-4US remote control unit."

"Error messages are displayed on the remote control units, simplifying service calls."

Page 9 of manual shows hot to set temperature using remote.
Water taps must be shut off to set temperature.
Circulating pump must be turned off.
"Simply press the H or C button until desired temperature is displayed"
"green in-use indicator will display"

If your unit is not working, the manual says to contact local plumber.
Fixya has specialists who will talk to you by phone about your problem for a fee.

I have a related concern. I put the Mr. Slim unit in my garage/workshop and most of the time need it just to keep the pipes from freezing. I'd like to set it at 45 or 50 degrees, but the lowest it allows is 59. I bought this to save energy, but it's forcing me to keep the room warmer that I'd like.

160 is not high-thats below warmup temp--the fan sensor has issues etc Vehicle is not gettin to operation temp so hav it diagnosed for free at a parts place-fan motor may be goin bad