Hello,


This is my first winter with my 08 TL.


I have no heat at idle. Can warm up for 30 minutes, cold as an ice box. Once I rev it up or accelerate I get heat.


I am in the auto business. So I checked the basics. Coolant full, no leaks, bled system, no air.


Obviously I am going to replace the thermostat next. Just curious if their are common issues I should look for, this is my first TL.


See attached picture, that's after 45 minutes, is that proper temp for this vehicle? thanks

 

never gets to halfway point always just below

 

If I am recalling correctly, there is a Heater Control Valve that sticks at times and may be worth checking.

 

will look into it thanks

 

https://acurazine.com/forums/third-g.../#post11381436

 

acura service said "no common issue try the thermostat" no mention of the HCV. oh well.....might as well do both I guess

 

Acurazine has been much more reliable over acura most of the time

 

My theory on this is if the engine itself is up to temp and behaving normal, the thermostat "may" not be the primary suspect. If only the heat is acting up, the prime suspects would be an air bubble or the HCV.

 

thermostat going in now. will see how it works out


heater control valve works. when I switch between hot and cold the lever attached to cable does move so I doubt it is stuck or restricted so not thinking HCV


thermostat/air in system im hoping

 

as of now thermostat and "bleed" seemed to fix issue, heat at idle now. time will tell tomorrow morning when its freezing out. it was 65 in shop.


the coolant temp read 200F prior to replacing thermostat so may not always be able to go by that

 

FIY the arm on the lever might works but the plastic valve on the inside could be broke off the arm therefore you can see movement on the out side but on the inside the valve does not open at all.

 

good point. its in a pain in the as* spot. will know later if its fixed have it sitting outside in 25 degree weather will let it warm up 20 mins

 

Yeah, I would've thought the same..

Color me surprised...

Sub'd for final outcome.

 

inspect the inside water valve, if its good then you might want to see if the heater core get some short of clogging. Eric the car guy has great DIY on how to unclog/flush heater core.