HEATER IS NOT BLOWING HEAT ONLY BLOWS COOL AIR. ITS A GOODMAN UNIT ARUF036-00A-1A. WHAT ARE SOME OF THE MOST PARTS TO MALFUNCTION IN THIS UNIT?

could be an air lock in the heater rad, back flush with a hose to clear.

I have a Goodman A/C unit APRF036-00B1. The out side unit seems to be sucking and bowing air, the coil is cool to the the touch and the blower seems to be turning. I've check what seems to be the obvious. A small amount of air is only coming out. Any suggestions?

It probably has a low refrigerant charge. The air coming out of the outside unit should be warmer than the outdoor temperature when in the cooling mode and if it's a heat pump it should be colder than the outdoor temperature in the the heating mode. Check the big line going to the unit, it should be somewhere around the 40 F range and the small line should be hot.

This sounds like the fan not turning during cool. You will have to check the fan relay for power during the cool cycle. The fan relay is run by the low voltage side, but still there is hi voltage present. When in heat the power goes thru the relay on one set of points then in cool goes thru the opposite side. You should have a digram present, and then on the main circuit board there is a code light. Check the light for blinking or (flash) read the bottom of the board for the code ( very small print)

I don't know what you use to heat your house, (heat pump, gas, oil) but if it is not a heat pump, i.e.. you don't use the outdoor unit to produce both heat and cooling, then the first place to look is at the compressor in the condensing unit (outdoor unit). If you have a bad capacitor, it will cause the compressor to pull locked rotor amperage (LRA) for an extended period of time and will cause the fuse to trip (usually within 2 or 3 seconds) The other possibility would be that something got into the wiring and have created a short. I have seen more insect and rodent damage to wires then you can imagine, so this is also a high possibility. Hope this helps

that's normal

Try replacing the control board most the time its a relay stuck open for high speed on your fan

you may have a bad heat sequencer

you can install a straight cool t stat that heats with the backup heat strip only. you can cool with ac only but using the heat pump reverse cycle will be a cheaper sourse of heat.have a pro look at it and give you some options. technology is changing so fast the best decision might be a new systemwith a new 10 year parts and labor warranty.

I just had a new unit installed and I am surfing for troubleshooting tips too. My unit is doing the same... cools well heat sucks. my problem has been isolated down to the reversing valve... It is constantly energised which means it is constantly in a/c mode even when kicking on the heat strips... We disconnected a line at the thermostat and it is working well as a heater now. You may want to check yours to see if it is actually kicking over into to heat mode... -rob