Poor Heating '96 FJ80

[wrxFTWdey]

Man this is awesome - gives me some great clarity to what the mechanism is that needs to move to open (allow) heat to flow in.

Yours was electronic with the high / low switch, you mentioned your fix there. Ill check mine and see - but am afraid thatd be too easy...did you have to take the whole dash off to see those componets?

Just have to remove the black black bezel around the radio and everything with it. Super easy to do. Couple screws and it pulls right out. Yours might be a tiny bit different due to it being a 94 but should be simple as well.

 

[fj40ingkc]

Having heater issues as well. 96 with 290k miles. Replaced the HCV, flushed the heater system and the heater core, removed the rear heater and replaced all heater hoses.

Here is the deal. When set in the cold position and fan on high, it blows a ton of air. When moved to hot, the airflow drops by 70% to 80%. It blows warm air for 2 minutes then gets less and less warm. The servo cable on the HCV works fine but I am guessing there is something wrong with the servo cable to the flapper and that is disrupting the airflow to the core.

I have also burped the cooling system with the filling system funnel and have replaced the thermostat. My scan gauge shows constant cooling temps so the thermostat is not the issue.

Where is the servo cable to the flapper located?

Thanks!

Hi @kilmarkid any luck solving this? Mine is doing same thing, heat won’t come out hotter than 95 degrees, about 20-25 short of hot and blowing not very strong compared to cold air setting. What was your fix? I’m wondering if it’s the way the auto control system changes flow to different vents.

Thanks -max