my heater works in rear but,not in front blows cold air and makes a clicking noise under center of dash board but blows hot air in back?
Mar 20, 2010 at 2:49 PM
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SERVICE WRITER
✓Experienced Mechanic
9,123 POSTS
Feel the temperature of the heater core hoses. Are they both hot? If one isn't, try backflushing the heater core. I like to get a couple pieces of heater hose and put them on the nipples of the heater core. Flush with a garden hose, drain the core with air if needbe. Fill it with a flush chemical and let it set for a few hours then backflush again.