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I have central heat and air lennox brand and yesterday my daughter turned it off all day and now the fan blows inside the house but the unit don't kick in.....

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You will need to check the contact on the outside unit, more then likely the relay is not pulling in or the fan motor is not working. When you up the panel it should be a black square with L1 L2 L3 and T1 T2 T3 the Ls are you lines you should have voltage if not then the breaker/fuse is off/bad. if you have voltage you should have the same on top, if not then the contact is bad if it is not pulled in. you can push it in and if should start the fan and compressor. You will also need to check for the 26 volts on the contact as this is what pulls/calls for the unit to work. hope this helped tim

Posted on Sep 09, 2010

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