2005 Hyundai Sonata Heater Problem

Maintenance/Repairs
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1

Our 2005 Sonata GLS with 100,000 miles has a digitally controlled system for the heater & A/C. For more than 2 years the only way to get heat was to raise the temperature up into the 85 - 90 degree range. Now we must put it all the way up to 90. When we do, the heat is extreme.

2

When was the last time you had the cooling system flushed and bled?

BC.