tripac room temp-sensor problems

(2009 thermoking tripac with espar bunk heater)

Where is THE REAL room temperature sensor? are there 2 sensors in different locations running at the same time that interfere with each other??

the room temperature sensor for these older Thermo king units is supposed to be the shiny rod-looking thing sticking out of the bottom of my control unit. My Thermo king unit seems to work OK in the summer, spring, fall, and in winter’s warmer days..... but when it gets super cold, my bunk heater comes on full blast no matter how warm it is inside the truck. In other words, toasty warm in the truck but the heater is still blasting and then I get WAY too warm. (temp set to 50, which is the minimum setting). It’s almost like during these colder days the room temperature sensor is located outside the truck where it’s actually cold.

I bought a brand new temp sensor and replaced the old one, and it makes no difference… I still get blasted with heat. I even took this supposed temp sensor and ran it down in front of the heater to warm it up (the tip) and it does NOT make the heater turn down! Not only am I way too warm but also I’m afraid I’m gonna burn out my heater fan and my heater fuel pump

any ideas??

 

OK I was told today the temperature of the air going into the intake on the heater will help determine when it decides to stop blasting hot air. My heater is located under the bunk where it is always very cold even when the rest of the truck interior is warm… So I need to run tubing from the intake of the heater to the main part of my truck interior where it is warmer, if that makes sense. So it’s not just the control panel Temp sensor in other words… Anyway thanks

 

77fib77 yeah this is basically what i did, cut a vent i can easily fill up when it gets warmer. works great...heater doesnt blast me anymore

 

egr truck...it's done way worse to me than this

 

good idea and i would have done this except it's so cramped under the bunk that just venting isnt going to lose me that much. theres like 4 cubic inches of air under the bunk cuz ive got so much stuff there. if there was tons of empty space and i was worried about the extra heat id lose, id do this