Originally Posted by mark0224
Will try that but why would it not try to light power light doesn't come on.
Sometimes "assumptions" can be a problem in themselves. When you said "power light", I assumed you meant maybe the illuminated blue rocker switch for the DSI..... and not the fault light.
As Lou pointed out, the "red" fault light only comes on while the DSI is attempting to light the propane, then goes off afterwards.
I sometimes forget that not all RV's have an illuminated rocker switch like in my current trailer (my previous one didn't have it, just the fault light) that is constantly on, whenever the rocker switch for the water heater DSI is switched to the on position. This blue light is what I assumed you were referring to when you said the power light.
If your RV only has a red fault light, then you may not have a propane problem, and your troubles lie elsewhere, like the bypass valve as Lou pointed out......but the pic you posted seems to have the bypass valve in the correct position.
You may want to see if the inside or outside shower wands are turned off...but the faucets turned on......as Lou suggested.