Not enough or no hot water

• 1). Check the water usage in your home. If the usage has exceeded the capacity of the water heater, wait for the water heater to fully recover.
  
  
• 2). Check the power supply to the water heater. Check to see if a fuse has blown or a circuit breaker is tripped. Replace the fuse or reset the breaker. Ensure that the disconnect switch, if used, is in the on position.
  
  
• 3). Check that the water heater is receiving fuel, if it's a gas heater, by ensuring that any cutoff valves in the gas line are turned to the on position. Other gas water heater problems need to be serviced by a qualified service technician.
  
  
• 4). Check the thermostat on the water heater for proper adjustment, and readjust the setting, if needed.
  
  
• 5). Ensure that all faucets in the plumbing system are in good repair and are not leaking and closed.
  
  

Other problems

• 1). Remove and clean the heating elements, if the water heater makes a rumbling noise. This is due to mineral scale that builds up on the elements.
  
  
• 2). Contact a qualified plumber if the relief valve makes a popping sound or drains water. This is due to excessive pressure in the plumbing system.
  
  
• 3). Adjust the thermostat on the water heater, if the water is coming out too hot.