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Discussion Starter #1
I installed a aftermarket cab heater on my Pioneer. I drove the machine this weekend and the air coming out of the vents was not very warm but it was close to 0 degrees Fahrenheit. I put cardboard in front of the radiator but that only helped a little bit. Any suggestions on how to make the coolant run hotter so that the heater will blow hot air?
 

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What brand of heater did you go with?
 

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Are your heater hoses getting as hot as the radiator hoses you hooked into? Possibly the valve isn't opening completely in the heater getting the flow it needs. If one hose going to the heater is hot and the other isn't then I would guess something like that.
 

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Along with what Toodeep says. Check the shut off valve to make sure it's in the right position and not just partially open. Check to make sure the fan is pushing air. Check your hoses for kinks. I wouldn't cardboard more than half your radiator unless you plan to keep a close eye on the temp gauge. But that's just me.
 

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Another thought would be an air lock in the heater system. Just removing the highest mounted hose and making a little mess will rule that out.
 

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Discussion Starter #7
Another thought would be an air lock in the heater system. Just removing the highest mounted hose and making a little mess will rule that out.
I checked the valve and it is open all the way. I am pretty sure that there is an air lock in the system. Are you saying to remove the highest hose while it is runing and then replace the lost coolant once the air is gone? Just wanted to clarify. Thanks.
 

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Don't know what kind of hills you might have around, but if you can park your Pioneer with the radiator cap being the highest point, you can just remove that, start the engine and work the hoses ( push them around or squeeze) and that should bleed the air out, then add fluid as needed. Yes you will want it running.
 

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Discussion Starter #11 (Edited)
I will have to work on it next week when I am at the property where the machine is. Will report back when I get it fixed. The temperature was cold last weekend...below 0 in the evenings with a high in the low 20's. The heater did blow warm air when using it hard but cooled down to nothing when putting around. Can't wait to get it working properly. For what it is worth, the Pioneer started easily at near 0 degrees.
 

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Depending on how you hooked it up you might have to bleed the heater system and then the vehicle cooling system. Possibly just loosening up the hose enough for it to leak will work to get the air out, if that is what is causing the problem.

On heaters I like to leave the return hose unhooked as I fill the system. Once it starts flowing out of that hose I then hook it up and finish filling the system. I very seldom have a problem with the vehicle system getting an air lock but it's possible also.
 
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