A very simple way to tell if the lamp is defective or you have no power to the water heater. Turn off any heavy loads. Do you have green light next to "Water Heater"?(Under Power Status on the Energy Managment System panel to the right of the AC Line readout) If yes, Look at your EMS "AC Line" readout. Now turn the water heater switch to ON, you should see an increase in Amps..This tells you the water heater is working and the lamp in the switch has failed. Common problem. Also remember the EMS will shut off the water heater first when you are using near the max of 30 Amps in your rig. If you are using the AC system or electric heaters to keep warm. The EMS has most likely cut power to the water heater. That's it's job.
I looked up the manual for your rig and checked the info.
The lamp on my rig's switch did not light when I first got it....Got it fixed, Now the darn thing keeps me awake. My mind can't accept a red light as OK.
"The point is, folks should not always assume everybody's equipment works the same. It's possible that the posters heater works differently than yours or a stock factory installation."
That is probably the best answer to ANY FORUM QUESTION I've ever seen. I have friends who have identical Fleetwood Discovery's, same year, same engine, same trans, same interior, same equipment (generator) etc. yet there's many operational characteristics that are different.
One has to start that monster 330 hp CAT just to bring the slide in. The other, just pushes the button, with engine off, and the slide comes in. There are other differences too but, like stated above, not all the equipment in these coaches is the exact same.
Scott and Karla SDFD RETIRED
2004 Itasca Horizon, 36GD Slate Blue 330 CAT
2011 GMC Sierra 1500 Ext Cab 4x4 Toad 2008 Caliente Red LVL II GL 1800 Goldwing KI60ND
For anyone who cares,
This is the switch that many of you are talking about. It's in the upper left corner of the picture. as you can see, it's a semi-clear rocker/switch. It is fairly bright when working correctly. And, also in the picture, just below the "Water Heater" switch, which is the switch for propane heating, is the operational indicator lights,one green and one red for "Pilot out". I don't know how many of your rigs out there are set up the same, but I thought this might help in case there was/is any confusion.
The bulbs in these illuminated switches burnout quite frequently. I have replaced at least 3 switches in my RV's. If you take the switch out of the panel, you may be able to identify the manufacturer and even get a part number. Not all my switches were identical, but I was able to order them over the internet. The light being burned out does not prevent the switch from operating; the light just does not illuminate. Hope this helps.