Convair Heating & Cooling - Recent Questions, Troubleshooting & Support

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If it like a breaker, they sometimes get worn and 'lazy', and will trip over for no reason mainly due to old age and overuse as an on/off switch. Or the cooler is drawing too much current (amps) for some reason. Or water is mixing with electricity. An electrician or HVAC tech can advise.

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Look on the 'Model - Serial number - Voltage - Amps' label near the mains plug (required by law), and then Google make model specs

You need to check the sensor or float switch for the water storage tank. It is either stuck or has failed and it's locking the unit out. It does this so the tank doesn't run over and flood the floor.

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Check out the start capacitor/relay.

Home Depot will have most common sizes of ducting. If it's a special size, look up Ferguson supply and they will carry what you need

Check the control box there is connecting cables are safe or somthi burnt out