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Discussion Starter · #1 ·
I've had a leak in my furnace the last couple of days. An HVAC person came and discovered that there was rust in my pipes and the water was leaking internally. He mentioned that the coils and pan were completely rusted over and cleaning the rust wouldn't help because the unit would continue to rust over. Is this true, if so, how much does a new coil cost?:furious:
 

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Is this an a/c coil we are talking about or some type of water coil for heating purposes. Assuming this is an a/c coil, they are typically constructed of aluminum and copper with galvanized end plates to hold the copper in place. The newer coils have pans made of plastic but the older ones were made from steel and would occasionally rust through. Replacement drain pans are available for most coils from the manufacturer.
However the most common cause of leaks is plugged drain lines, you may want to check this first.
If the pan is rusted there is a spray on product that you spray into the pan an is supposed to seal leaks.http://www.johnstonesupply.com/corp/tabid/1783/default.aspx?product_group=128
But the best option for a rusted pan is replacement of the pan.
 

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Discussion Starter · #3 ·
Rusted Coils in Furnace

Yes, this is an A/C coil I'm referring to. I actually do have the newer coil pan that is made of plastic. The symptom was that the pipes were clogged; however, I was told that the true issue is that the coil is made of material that rusts and is completely rusted throughout. The HVAC guy said that he could clean the current rust, but that the unit would continue to rust and clog the pipes because the coils are rusted pretty bad. He suggested that I replace the entire coil. He says they now make coils out of a material that doesn't rust and they run about $750.
 

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Are you saying you have a newer pan installed to an older coil that is falling to pieces?

You may have a galvanized or black steel nipple connected to the drain opening that's rusting shut the drain.

Call another guy. Galvanized does not rust that quickly.
 

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Are you saying you have a newer pan installed to an older coil that is falling to pieces?

You may have a galvanized or black steel nipple connected to the drain opening that's rusting shut the drain.

Call another guy. Galvanized does not rust that quickly.


I don't think the galvanize that is used today is as good as years past.. I have seen some coils only a year began to rust around the galvanized metal... Chalk it up to all the greeen people:whistling2:
 
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