Is flame clear blue or yellow?
Yellow flame, clean the flame arrestor screen
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html
Flame is blue:
Low gas pressure.
Bad gas control valve.
Dirty combustion parts.
Clean the water heater parts and catch up on maintenance.-
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent
Gene
If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7
SOURCE: water heater not heating it's a richmond water heater
Now change the thermostats........this is the only other thing it could possibly be.
SOURCE: i have a richmond gas hot water heater model
resetting your lock out for richmond power vent
SOURCE: pilot light on water heater goes out frequently
Check the following:
See if your heater has a pilot gas adjustment valve. It should be on the gas control valve somewhere. Not all heaters have these. It will be a screw on the valve that can be turned.
Make sure the thermocouple sensing bulb is squarely in the pilot flame and also check that the fitting where the other end of the thermocouple connects to the main gas valve is tight.
Check the pilot gas orifice (where the pilot gas comes out) for carbon build up - you may need to remove the pilot gas line and thermocouple assembly to get to this. This problem is pretty common.
Check the gas pressure to the heater. Run the hot water in the dwelling until the hot water heater starts. Check the flame on the main burner and see what color it is - it should be blue with possibly some yellow-tipped flames. If not, there could be a problem with the gas pressure at the heater or venting. If the heater has a gas pressure regulator, it may be out of adjustment or defective.
Finally, and this isn't very common, the pilot light can be extinguished if there is a draft problem, usually associated with an issue with the flue pipe venting system for the heater or another nearby gas consuming appliance.
Testimonial: "thank you. will try these suggestions tomorrow. really appreciate it."
SOURCE: AFTER LIGHTING MY RICHMOND 6G40-36F1 WATER HEATER
The thermocouple is weak or the pilot needs to be cleaned. If the pilot flame is strong, try replacing the thermocouple which is the tube that the flame burns on runs back to the control valve/
SOURCE: I have a Bosch AquaStar AQ-125-BNG tankless water
there is a small dia copper pipe which has a thermal coupling on it the end of it sits in the flame of the pilot light,
if it fails which it does after about 25-15 months,it shuts down the gas burner
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