Pilot light alone will not produce enough heat to damage the tank, but the main burner will destroy the tank and possibly start a fire. Why would anyone want to leave the pilot light on an empty tank?
Never
My light is blinking when relit my pilot but my water is still cold
If the pilot light is on, the heater should come on by itself. If the pilot light is off then it has to be lit. If it will not stay on, the thermocouple is bad.
You don't. If the heater has an electronic spark, then it doesn't have a standing pilot to light. The spark lights the pilot when there is a call for heat, which in turn lights the burners. If the heater is on and the pump is RUNNING, the heater should light automatically when the water temperature is lower than the heat setting.
Have you turned the control from Pilot to On? Have you increased the temperature setting?
High winds, pilot generator. Is the heater located next to a wall? Is the heater door closed? Does the heater have a draft hood or what they call a stackless heater? Ken
because its leaking out gas
the pilot light in my fireplace is working but when i turn the switch on (new switch) it wouldn't fire up
Gas water heater has an orifice for main burner and for pilot light, if not electronic ignition.
Most likely your pilot light is out
Yes
Check to see if you pilot light is lit
Turn knob to PILOT, press button down and light the pilot; hold button down for 60 seconds and release - pilot should remain lit; turn knob to ON. If pilot does not remain lit, turn knob to OFF, wait 5 minutes and try again, If pilot still will not remain lit, replace the thermocoupler.
You could have a dangerous vent back flow problem. Please call your utility company about an inspection (mine doesn't charge for this). How old is the water heater?