Is there a way to manually load/unload air compressor on a Cascadia

I believe my load/unload valve is stuck, and I'm not building any pressure. I replaced the governor and the entire air dryer, doesn't help. I am just trying to get the truck to move to the shop. Is there any way to manually force the valve on these compressors? 2014 dd15 cascadia.

 

I had TA change the compressor, seemed to work. And now the whole vicinity doesn't smell like oil anymore whenever the air drier puffs. So that's good.

Now my espar heater is starting to go bad, and that's not so good. Do you know anything about those things? You seem to always have good mechanical advice.

 

Nice, I'll try that next time when on a lazy load. This thing has had no maintenance whatsoever, certainly not in the 400,000 miles that's I've put on the truck. And probably not in the previous 400,000, miles either, because werner.

Anything critical to watch out for so I don't make it worse? I'll try to find some youtube videos too.

 

Some other guys are telling me to run the heater on kerosene for a little while. They say it will burn off the deposits without needing to take stuff apart. What do you think?