What does the code L mean that appears on the temp window on a Rinnai heater Rhfe-202FTA

SOURCE: Rinnai RHFE 1001FA

i have a rinnai rhfe 1001fa heater and when its real cold sometimes it will shut down all the lights go out and i have to shut it off then turn it back on and sometimes it still wont start and i will leave it of for a day or two then try it and it will work it seems to act up more when its colder i am running it this fall so far no problems this unit is around a 1994 or so and has not given any trouble till this started last winter

SOURCE: Rinnai RHFE 1004F Error code 49

A 49 error code is caused by the pressure switch either not proving or a bad component. Check the hose attached from the plastic elbow located behind the heater going to a small square pressure switch found inside the heater. It may have come loose or a mouse may have taken a bite out of it. Also while you are behind the heater, pull off the hose that looks like a vacuum cleaner hose and run the heater with it unattached. If it runs, you have a blockage in the vent. If not, take a flashlight and go outside to the vent. Look down the center pipe for any obstructions. If it still does not work, you may need a new pressure switch.

While the front panel is off the heater, cycle the heater to attempt a start. You want to make sure the blower turns. If it does not, check the wire connections to it. You may be looking at a bad blower. If it is turning but still does not start, we are looking at a bad pressure switch.

Let me know what you find, I may have a switch or blower motor that you can purchase.

SOURCE: Rinnai propane heater Model RHFE-556 -

Yes, there is an Eprom setting that should hold settings up to 48 hours. You can find a manual by going to www.rinnai.us.

SOURCE: Rinnai 1004 F Error Code 11

Code 11 is that the unit is trying to light but does not sense a flame after 5 seconds. Usually means you have run out of gas if you are bottled gas. Check your bottles are turned on if you are on LPG, you might need to change over manually. Have you anything else on gas?

SOURCE: Rinnai RHFE-263FA showa error code 11..Replace

Error code 11 denotes ignition failure
Ignition Failure

Here is how you can resolve the issue.

1. Check gas supply, gas type, gas pressure. Verify gas supply and make sure gas lines are purged.
2. Check dip switch settings. Is the unit a converted unit?
3. Check condition of flame rod. If dirty determine why.
4. Check for flame current. (see flame current instruction in this guide) Ensure that all connections are tight.
5. Check all gas solenoids for proper voltage and ohms.

if you want a troubleshoot manual get it here