Hi the plates/burner needs cleaning out blowing then out with air line when off should help
Make sure your vent is clear and its getting enough combustion air.
Hi it is blue with a slight yellow tip
Hey buddy ya wouldn't happen to have a owners manual for that heater would ya? I have the 5 stack vp2600e and I can't find a manual anywhere. Was wondering maybe there's a website on your manual somewhere that may help me out. I appreciate it
You have a bad THERMOCOUPLE. Try a Appliance Parts Store or online with your model number. Had to find.