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Why does my air conditioner trip my breaker when it kicks on?

Don't have model information at hand. I have central air outside hooked into my heating unit that is under the house. The air conditioner has worked fine for years, it just started doing this in the last few days. A few weeks ago(using heater at that time), we started hearing a consistent buzzing noise that sounded to be under the house about every 7 minutes or so that would last for a minute and then stop. The fan for the heating system would not run. I thought that the fan was locked up and tripping the reset switch and when it cooled off, the fan would try to restart again and make the same noise. The fan motor is working currently but now when the a/c tries to kick on, the breaker for the heater is thrown. Could I have a heater fan going bad and this be throwing my breaker or is it something else?

Building Supplies , HVAC
2 Answers from these members:
scott d
by scott d Earned 8,250 community points in Building Supplies
May 18th, 2009
0 votes
Mark Innes
by Mark Innes Earned 7 community points in Building Supplies
July 31st, 2010
0 votes
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