ok installed a tiny pc fan and temps sky rocketed im my LG!!!~~HELP!!

[EAST TEXAROO]

Ok I installed a 40mm 12vdc pc fan in my lg. The temps skyrocketed to 120. The fan is a tiny little thing and pushes air slightly. I mounted it north of the thermostat were the fan kit would go. Any one have problems with this also? I can turn the fan off and the temps will go back down to 100 and stay there. I can not get it to stablize with the fan on. All it does is climb up to infinity

 

[thebigroo]

Make sure there is a gap between the surface where you mounted the fan. The fan motor sounds like it is overheating. You might also make sure that the amperage for the fan and the power source are compatiable. The last thing is some fans turn only one way. Look on the cover for a direction arrow. Usually the fan will turn clockwise. With the fan facing you the data plate is usually the front. Try revesing the wires if it is not turning the correct way. Later, Larry

 

[EAST TEXAROO]

I have a 1/2 in gap between the fan and the top. The fan puts out absolutly no heat, And the air is being pushed to the eggs. The temp rise is almost immediate, In 10 min it will go from 99-100 all the way to 120. It almost seems the fan cools off the thermostat thus making it run while the air around the eggs heats up. I tried removing the plus in the top of bator but that made it rise even worse. I am stumped think Ill leave it as a still air.

 

[silkiechicken]

I think you hit the nail on the head when you say the fan is cooling the thermostat. If you add a fan to the system, you have to adjust the thermostat accordingly. If you're drawing in room temperature air over the thermostat, it will think it is colder than it really is and keep on heating. I'd just dial the thermostat down till the target area reads the proper temperature or anchor the fan so it circulates air inside the bator and does not draw in cold air as readily over the thermostat. Or if you know where the thermistor or thermocouple is, insulate it a bit with a shield of some sort so it does not get direct cooling from the air intake.

 

[EAST TEXAROO]

This was a used bator I picked up for $20. It will not adjust accordingly with the fan on. I turn it counter clockwise until it will not turn anymore as low as it will go, still 117 degrees. I wil try to move the fan to a new location.

 

[pascopol]

Quote:
All DC (direct current computer fans) will turn either way, to change direction just reverse terminals (wires).

That will not work will 110 V AC (alternating current) fans.

They can turn only one way.

 

[walkswithdog]

I wasn't sure from your post but air should go UP from eggs to fan, not down directly from fan to eggs. That would make a cooling problem. So fan direction should face the roof, not the floor. Is that clear? And all, all moving appliances generate heat whether you can detect it or not. Everything that moves generates heat period.

Adding a fan affects temps on three levels, more air, additional fractions of heat, and movement of air toward or away from a thermostat.

That's why you don't do it when you have eggs in there unless you have a good idea of how to compensate from the beginning.

You can't add a fan and have it not affect the temps and require recalibration of the whole.

It will work, you will get there.

 

[ColbyNTX]

I hope there were no eggs in the bator!

 

[thebigroo]

He said it was a 12 volt dc fan motor. I told him he could switch the leads. You can do the same thing with three phase ac motors also.
Quote:
All DC (direct current computer fans) will turn either way, to change direction just reverse terminals (wires).

That will not work will 110 V AC (alternating current) fans.

They can turn only one way.

 

[thomas h]

Well after playing with a empty incubator.
you can not add a fan with eggs in there.

The fan has to blow the air across the heat source toward the thermostat..
It may take a few ajustments but it works sort of ..Sort of

I glued a tiny fan to the houseing toward the thermostat .the were small holes on the housing and very few.So that in the end there is very little circulation but it improved the temps near the sides ...
And the humdity has to be worked out against the ventalation ..

Now that I made my own incubator I can see the problems of the whole set up but now My temps in my own incubator or holding at .2 degrees F running ,,,and at .3 degrees F variance in the day . ,,, .4 at night ..It runs a little hotter at night ....99.7 to 100 .

thomas