<!-- from fixya rte -->FAN SLOW WHEN HEAT TURNED ON - Amana PTC093B50AJ Electric Heat Air Conditioner

Phillip: According to FamilyHandyman.com: "free up the condenser fan. Coils on the back of a fridge create their own airflow as they heat up. Models with coils underneath have a fan to push air through them. Dust buildup can slow the fan; wads of paper or other trash can stop it altogether."

Might be cooling fan clutch or the electric fan could be broken, the engine-cooling fan moves air through the radiator when your car is stationary or traveling at a slow speed, this air removes the heat from the coolant created by the engine, using the radiator as a conductor. When the cooling fan no longer works it causes the coolant to overheat which causes the engine to overheat. Also check the radiator, when the AC is turned on, the heat released from the condenser located in front of the radiator reduces the radiator's ability to remove the heat and the engine starts to overheat.

just a note make sure your fan is workin at both speeds.mine was only workin at slow speed,so when i turned the ac on it would heat up..

-try adding additional fan in the casing -in adding fan make sure that you have a blower fan and a exhaust fan where in air can get in and out inside the case.
-add thermal paste/grease between the processor and the heat sink. it is often used to aid the processor's thermal or heat transfer via heat sink. -you can also add blower fan in the chipset of the motherboard -you can also add heatspreader in the memory. -check the power supply if you are getting enough power -having too much power may result in over heating and may damage the devices -having less power may result slow system and bad performance.

Your fan is catching the element which has distorted with heat

The cooling fans won't run until either the engine coolant temperature reaches about 218 degrees or the air conditioner/defroster are on. Once the engine reaches appx 218 degrees the fan will come on and run until the coolant temperature drops a few degrees and will then turn back off. If either the a/c or defrost are turned on then the cooling fan will begin to run to remove the heat from the a/c system and should stay on until either is turned off. If the engine is overheating in slow or stop and go traffic then the fan may not be working at all due to a bad fan motor or blown fuse.

so the fan does not spin and blow air? it could be a stick broken fan try free spinning it make sure its turned of. if fan spins freely its probably your start capacitor which is not to expensive.

Sometimes this is caused buy a vacuum problem. It is not opening the door to let your air in at a slow speed. The doors are opening at high speed due to the air pressure from the outside air. Make sure that the fan is runnig by turning your ignition on but not starting the engine. Turn the fan on high and see if you can hear it. If the fan is running then take you car to a mechanic you trust and have them check the vacuum going to the door.

you are correct . it is the convection . the fan blows the air around and away from the elements ,when that is happening the elements can never get hot enough to glow , as the oven gets hotter and at some point the air is so hot even with it blowing the elements will start to get red ... this is good because todays elements are thin and cheep and melt easy so the fan keeps the heat away from them and the elements last longer ...... if this answer helped please rate it a 3 or 4 stars .this high rate will help keep me in the paid answer department ... thank you

May be the CPU fan is going bad. I hope it is that simple.