Coleman model DGAA-090 - http://www.hvacmechanic.com/ Forums
Original message
| phil schelin
 |  "Coleman model DGAA-090"
, posted Thu 26 Oct 12:00  
Heat Exchanger failures while under warranty .
Model DGat-070 has beeen under a recall however, in our manufactured home community there is a growing number of Coleman model DGAA-090 heat exchanger cracks reported.
In addition, the replacement units must be under a backorder condition as we wait 19 days for a new unit .
Style Crest technicians ask for these tests to be performed.
"Can you provide me with operational data on the units you have witnessed the cracks".
We would like to know:
the supply static pressure;
the ATR (air temperature rise);
the manifold gas pressure;
the firing rate.
I'm looking for data on the number of similar failures in your areas.
Phil Schelin
frankfort il 60423
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