bam361

I have a Eddie Bauer 2003 expedition and my rear heater only blows cold air, any ideas on what it could be?

CatSkinner

The rear heater core is probably the most remote part of the coolant circuit. It can easily get air bound, it's where deposits are likely to settle out, and it will be the first place that will indicate that your pump is getting worn. Any one of these conditions will cause the return hose to be much cooler than the supply, if this is the case, you've got a flow issue. If both pipes are cold, you've probably got complete blockage.

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