DIY Home Improvement, Remodeling & Repair Forum > Appliances > HVAC > 25 yr. old unit not cooling




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Old 07-10-2009, 08:25 AM  
hoarymug
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Default 25 yr. old unit not cooling

With outside unit clean and ner filter, our system doesn't cool, but does run. I'm thinking its R-12. What are my options? Anybody have experience with alcohol coolant?



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Old 07-10-2009, 01:35 PM  
kok328
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Being that old chances are that it is an R-12 system which R-12 is hard to come by and if you can find it, it's very expensive. I would assume your options are to retro the old system to 134-A or just replace the entire unit. You may be able to get a tax credit depending on the particulars govt. tax credit and efficiency of the replacement unit. I don't believe residential systems have a low pressure cutout so it's basically running itself into the ground and will eventually cut out all together from internal over temp.

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