Water not hot even thermostate turned to high. The pilot light is on. Shoulder I be able to visualise the burner actually firing.,or hear it firing. I can see the pilot light clearly. Please help

If the pilot is lighting and the thermo couple is in the fire and turned red and the pilot still does not stary on change the thermo couple. They are available in any home improvment store.

Tankless?... call service technician

Tank? clean arrestor screen, replace gas valve thermostat
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

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

You can reset the code by turning Gage all the way up highest setting count to ten turn it to hot could to ten then turn to pilot count to ten and then turn it to desired temp burner should come on. Saves lots of money and time

You need to inspect and clean the air intake located on bottom of unit. Get more fresh air to the water heater and see if problem continues.
http://waterheatertimer.org/images/Flame-trap-inspection-325.jpg
http://waterheatertimer.org/images/State-select-air-intake-400.jpg

Instructions for lighting the unit are located on front of water heater.
Other possible causes include: bad gas control valve, dirty combustion parts, reverse draft down the stack (caused by wind and opening door inside closed utility room), low gas pressure, air in gas line, etc.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

Propane gas is heavier than air. So if you have a gas leak, then smell close to floor. Leave house immediately if you smell gas. Install a gas detector close to floor level near gas appliances.
Most water heaters today are extremely safe, because we experimented on prior generations of people, who then passed along their experience.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

I know from you info that you don't want to work on it any more but this will help if you decide to try again.

Troubleshoot
Q. No Spark At Pilot? Q. Spark Appears When Hot Water Is Turned On, But Pilot And Burners Will Not Ignite? Q. Pilot Sparks Continuously With No Water Running? Q. Pilot Lights But Burners Will Not Come On? Q. Main Burners Go Out During Hot Water Use? Q. Hot Water Temperature Fluctuates At Tap? Q. Water Is Too Hot? Q. Water Is Not Hot Enough? Q. Burners Do Not Burn Cleanly; Yellow Flames When Operating? Q. Burners ignite without water flow? Q. Low hot water pressure? Q. Noise when the heater is running?

Clean the burner and burner tubes.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#clean

Read your manual for maintenance and troubleshoot steps

This is a great unit! Try turning the flow nob to the half way point and the flame all the way to low. Run the hot water tap and slowly turn the flame dial until you hear the unit try to light. Every house is different regarding the restrictions in the plumbing and water pressure. Once the unit tries to light that is your minimum setting. It is best to leave it there.

my gas hot water systems pilot light is on but yhe burners dont ignite when i put the hot water on,so in turn im not getting any hot water

LP OR NAT GAS , IF IT IS LP CHECK GAS PRESSURE @ TANK AND MAKE SURE NOT TO HIGH , IF NAT STILL COULD BE THE PROBLEM HAVE THE GAS COMPANY CK PRESSURE

it sounds more like the ignitor thats messing up, if you are able to remove it and get a new one that would probobly do it for you