A heating question

daytime dave · Oct 23, 2013

Last night was the first night I needed to use the heater. I set it for defrost first, then full vent. My side, the two driver side vents, blew cool air. The three on the passenger side were throwing the heat.

Does anyone have any idea what might be going on? My Ram is a 2003 1500 SLT with the 4.7. The air conditioning appeared to be flawless this summer.

I have had the truck since June. I never needed the heat until lately.

MegaMouseGW · Oct 23, 2013

Sounds like one of the doors that control where the air goes is broken. YouTube ahs several videos on this. Just do a search for Blend Door dodge ram.

daytime dave · Nov 3, 2013

I appreciate the response. I thought I would post an update. The blend door headed me in the right direction. As my internet research continued, I found others with the same issue, no heat on one side. The common solution was a flush of the heater core.

I flushed it with a garden hose and added some CLR product. I don't think much CLR actually got in. Thorough rinsing after and the heat is flowing nicely. It's much warmer in all the vents.

FarTooMuchhh · Oct 13, 2017

wow, really?! (I realize this is an old thread, but im searching for answers). I have an '06 SRT10 QC and I get cold AC on both sides and hot heat on the pax side, but no heat on the driver's side. Can you please share your heater core flush method? Thanks!

justin13703 · Oct 14, 2017

FarTooMuchhh said:
wow, really?! (I realize this is an old thread, but im searching for answers). I have an '06 SRT10 QC and I get cold AC on both sides and hot heat on the pax side, but no heat on the driver's side. Can you please share your heater core flush method? Thanks!

Not sure that they’ll reply after 4 years lol but usually you disconnect the heater core hoses in the engine bay and flush through them in both directions with a garden hose. When I did my Jeep I made a fitting that would attach the garden hose and heater hose together. I think it was a barb type fitting to go into the heater hose.

A heating question

daytime dave

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MegaMouseGW

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daytime dave

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FarTooMuchhh

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justin13703

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