05 gmc yukon xl

[05gmcyxl]

If the rear ac lines are blocked will that also block the rear heat?

 

[MassHoe04]

I am not the HVAC expert, but I might be able to help you clarify some details that could better get you an answer to your question...

Are you talking about tubing/ducts moving air to the back vent ports or are you talking lines as in refrigerant lines up front for the compressor and condenser?

 

[OR VietVet]

Welcome to the forum. If you are talking about just the lines, no it will not effect the heating.

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving sage advice from the knowledgeable folks on this Forum.

 

[SnowDrifter]

Ac lines won't make a difference to rear heat. They're 2 separate loops running to 2 separate heat exchangers tucked in the RR quarter panel. Temperature control is carried out by airflow switching between the two - blend doors.

However, rear blend issues are relatively common on these vehicles and that WILL cause issue.

Also of note, if your a/c lines are blocked, I'd address that sooner rather than later. They don't block for no reason. Either there's a compressor failure... Which you should sort. Or there's some stop-leak stuff in there that gummed up the system, which should be addressed before it causes more damage.

 

[Bipolaryukonxl04]

we blocked the back lines off for the ac because the rear lines where broke and cheep fix was a rear blocking kit. the heat works when it wants to but hasnt in a while

 

[05gmcyxl]

 

[05gmcyxl]