The most obvious reason for air in your hot water line is due to the condensed water from the heater that might turn into hot air bubbles. This might happen if your heating appliance is malfunction or somewhere in the pipeline there is a small Plumbing leak. If you can, repair it yourself, or hire a local and professional plumbers near you to tackle the situation.If you are in NJ hire A-General plumbing and sewer services for fixing the leaks.
bad water pump or low coolant level
it could be from the hot water heater if it's not turned off. hot water expands pushing out more water when cool the heater can suck in air to fill the voide.
It sounds like air is in the water heater. It happens when your city water is shut down for repair sometimes and you get air in your pipes when the water flow is continued. You didn't open the valve enough or you may not have an air trap pipe.
Steam heat normal Hot water perhaps air in lines and need to be purged
hot water in a freezer will get hotter depending if the freezer is turned on.
Hot air.
Hot water tank not working or a faulty faucet.
Only if the hot water breaker is turned off.
No. If you have hot water heat, you also have a separate air handler for the AC to circulate the air.
they slow down
air in water lines usally accur when the water in turned off for some reason,just let the water run in a tub for 5 min. air in water lines that make your pipe rumble, you need air chamber installed. its called water hammer turn of all hot faucets and run till air stops coming out and steady stream of water comes out.
The hot water heats the air inside the balloon - making it expand.