Water heater repair. Only 6mths old, possible air bubble in water sply

Simon requested 2 quotes from Plumbers in Elwood

Hot water supply not functioning. Called water heater supplier (Rheem). Believes it is an air bubble in the system.

Hot Water Heaven Pty Ltd

Check instantaneous hot water service gas flow 'Rheem'. easy access
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electric hot water service is not working-no hot water, unit is located in...

Faulty high preassue relief valve
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Hot water service
I’m wondering if you can have someone come out to have a look at the hot...