Boiler Not Heating Water Tank

What are the causes of no hot water from oil fueled boilers.

Boiler not heating water tank.

Check that you have electricity gas and water the first rule of solving problems with your boiler is to start with. Also check the heating circuit fuses and the circuit breaker itself. Some thermostats control not only the heating but the water heating and a thermostat will not turn on. Often this issue is caused by the gas supply so check to make sure your propane tank is full before you do anything else.

Check and open gas and water valves fully. A tankless water heater heats the water instantly instead of storing it in a tank. If your gas valve or water valves are not fully opened this could also cause the ignition to fail. This is the more likely cause if the change in heating capacity has been sudden.

Open the covers with a screwdriver and look for a single small flame. If you have a gas powered water heater and the pilot light goes out the water will not be heated. The main difference between electric and gas water heaters is the heat source. These are the common problems for a poorly heated boiler.

As you turn on the water and set the desired temperature a tankless water heater will heat the water going into your shower or sink for as long as you have the water running. In an electric water heater the water is heated by electric upper and lower heating elements that extend into the water tank. Open the burner access covers and check the status of the pilot light. If it is out re light it.

This is the likely cause if the change has been gradual. Is there a fault code displayed. Check the boiler controls if you still have no hot. Many boiler problems will result in a fault code being displayed in your control.

There are several reasons your water heater could fail to ignite. The minerals buildup may prevent water from entering the tank as well as making it more difficult for the heater to warm up the water. The water entering the tank may carry those deposits as well as some other substances which will make it impossible for the heater to work correctly.