<human>:  How can I tell if my water heater isn't working properly?
<bot>: You should start by checking to see if the water heater is receiving power. If it is, then you should look for any signs of water leakage or other issues that may be causing the water heater to malfunction. If that doesn't work, you should consult an expert who specializes in water heaters to ensure the problem is diagnosed and fixed correctly.