Lexus LS 2007+ :: Heat Not Working At Idle
Nov 14, 2014
Well of course with the coldest weekend of the year coming up my heat stops working.
When I'm driving it pulls heat off the engine just fine but stopped it just blows cold air.
Nov 14, 2014
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Lexus LS 2007+ :: No Interior Heat At Idle - Low Coolant In 2008 LS460L?
My 2008 LS460L blows cold air on cold days/nights when the engine is idling. Raising the RPM to about 1500 causes heat to start to flow out of the air ducts. I also hear a gurgling sound behind the dash when accelerating normally from idle. The water pump was replaced by Lexus in late April 2014.
I have checked the coolant reservoir (engine cold) and found it to be slightly below the "LOW" coolant level mark (not empty). It would seem that since the feed from the coolant reservoir is on the bottom of the reservoir, as long as there is some coolant in the reservoir, the rest of the system should be full.
All things considered, are the two issues (no heat & gurgling sound) more likely to be caused by low coolant in the system, the relatively new water pump, or something else? BTW, what is the proper method to top off the coolant in a 2008 LS460L? Are there any special bleed ports for eliminating air pockets?
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After the engine is warmed, my normal idle in drive, park, neutral, or reverse is around 650-700 RPMs.
I have recently noticed that when a combination of conditions occur, my idle hovers around 450-500 RPMs and is pretty rough. This low, rough idle occurs when:
1) The car is in drive;
2) The car is at a full stop (foot on the brake or auto-brake hold);
3) All accessories are off (heated seats are off, radio is off, headlights are off); and
4) HVAC is Off.
I went to the dealer and they ran diagnostics. No error codes were recorded. The dealer looked at other ls460s and said they all do that. By the way, I noticed this after my VSR was done.