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I just had a home fire that started when the Carrier WeatherMaker

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9200 black pan melted -...
I just had a home fire that started when the Carrier WeatherMaker 9200 black pan melted - for some reason the furnace temp gauge didn't turn off furnace. Six fire trucks came to my home. In less than a nimute a faint chemical order quickly filled entire home with smoke. Nobody has seen anything like it - or seems to know why it would get that hot. The melted black rubber is sprayed everywhere throughout furnace ducts, AC etc. Everything myst be replaced. But why did it happen? Can't find answers...
Submitted: 2 years ago.Category: HVAC
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Answered in 38 minutes by:
5/4/2015
HVAC Technician: Tim H., HVAC Professional replied 2 years ago
Tim H.
Tim H., HVAC Professional
Category: HVAC
Satisfied Customers: 3,971
Experience: Experienced in all aspects of HVAC, both residential and commercial.
Verified
Hi, I'm Tim and I'm an HVAC expert here to help answer your question(s). Please provide all the information I ask for since I'm not onsite. At the end of our dialog you will be asked to rate my service, but please wait until then and all your question(s) have been answered satisfactorily. Thanks for your business!Which pan are you referring to? The one on your air conditioning A-coil? Or the collector pan for the secondary heat exchanger?
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Customer reply replied 2 years ago
AIr conditioner coil pan
HVAC Technician: Tim H., HVAC Professional replied 2 years ago
So your question is "why did this happen"? This can occur if your limit switch on the furnace was defective. The limit switch or limit control senses when your furnace gets too hot and then shuts off the burners.
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HVAC Technician: Tim H., HVAC Professional replied 2 years ago
I've also seen cases where someone has jumpered out (bypassed) the limit because they didn't have a replacement part.
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HVAC Technician: Tim H., HVAC Professional replied 2 years ago
This problem could have been compounded if the air conditioner A-coil were plugged either partially or fully.
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