Being aware of how to light the pilot valve is a means to living with a gas water heater; observe the instructions on the tank. To be safer, a gas heater is equipped with a thermocouple. That is a thermostatic appliance that strikes the pilot flame and turns off the gas if the pilot light runs out. As a rule, the gas flame is blue. In case it is orange, mount the shutter; if it is still orange, call a special service. 
Each six months test the fume duct assembly to be confident it’s well aligned and all its junctions are retentive. Then test the fume duct by putting your hand close to the draft diverter (with the burner on); air coming out indicates an impediment that should be eliminated. It is advised to annually turn off the gas, remove the access panel and clean the burner pots with the help of stiff wire or a needle. In case you smell gas, come out of the apartment instantly and call the gas company.
Absence of hot water
Inspect for:
• Unlit pilot light.
• Pilot light stops burning.
• Foul burner.
• Faulty thermocouple.
• The gas is not flowing out.
Solution:
• Gingerly relight the pilot.
• Make certain the gas controls are fully switched on. Then test the thermocouple and be certain it is tightly connected to the gas control unit and placed next to the pilot flame.
• Call an experienced contractor.
• Substitute the thermocouple.
• Call the gas company.
The water heater becomes very noisy
Inspect for:
• Crust and residues in the tank.
Solution:
• Shut off the gas and exhaust the tank.
The water is too heated
Inspect for:
• Improperly set thermostat.
• Faulty thermostat.
• Clogged expulsion vent.
Solution:
• Set the thermostat again.
• Consult an experienced contractor.
• Test the vent and clean it.
Water is leaking from the heater
Inspect for:
• Seep out in eduction valve.
• Dripping safety bibb.
• Crack in the tank.
• Seep out in the plumbing joint.
Solution:
• Shut the valve tightly or replace it.
• Test the temperature of the water. In case it is too heated, the thermostat may be out of order. If the safety bibb is faulty, substitute it.
• Purchase a new heater.
• Call a professional plumber
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