3 year-old Goodman compressor/heat pump terribly loud @ start

In general the answer is yes. But no fan and no compressor points to a problem. Is the house heating using the auxiliary heat then?

Whats making this sound? Is it compressor or fan motor?

adding a tvx will not help. the sound you here is the pressure equalizing and that has got to happen for the compressor to start again the next time. A tvx will give you a higher efficiency because it can adjust to changing temperature conditions. Only way i know to quiet the noise is to try to insulate the lines better.

Taking a little bit of time for heat is normal but the "pressure" thing you are referring to leads me to believe that the reversing valve is getting stuck. You will here that "pressure release" noise with a reversing valve but it should not be happening 5 minutes after start up.

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If you have a AC unit with electric or gas its doing what its supposed to do, let the pressures in the system equilize before starting again, If you have a heat pump its doing it there as well you just have not noticed. Anti cycling is a good thing, 4 to 5 minutes is normal.

Easy: Turn the "fan" switch to on at the thermostat and see if the blower starts. If no start, check breaker at breaker box. Check service disconnect at or near the air handler. With the breaker and/or service disconnect OFF check the 3 or 5 amp fuse inside the top cover in the air handler.
Not so easy: (You must know what you are doing for this part or let an HVAC Tech do it for you) Open thermostat and firmly jump the Y and R terminals to see if you get the compressor to start for no more than 30 seconds. (don't do it more than once.) Jump the G and R terminals to see if you get the blower to start. If so, u have a bad thermostat. If not, check the transformer inside the same cover in air handler for proper voltage. (24V. Make sure you also get 220 on the opposite side of the transformer)
If the blower comes on, but the heat pump doesnt start, open the side cover of the heat pump, with the thermostat on cool, and the temp. setting as low as possible for at least 10 minutes see if the contactor is pulled in. If so, check the capacitor and see if it's blown out. Be super careful these systems operate with 220v and the amperes are enough to kill you if you make a simple mistake.

I don't think this problem (btw I agree 'from a far distance' with the Hvac guy) is inherant to Goodman, after all the compressor (that is in the unit) is one that if found in other brands too.

Of course the compressor is under warranty so there's no charge for it - but - $800 to change out the compressor (and that's the proper fix) is a 'bit' high - you possibly could save a few bucks by getting some other estimates.

good luck!

hi, there there are several things to check1 considering that is the replaced unit one is new not mention here,but we can make it possible sometime after replacing unit and run several year the connection on low side loosen connection due to vibration inssufficient support can be done this,if ther is small leak on low mostly not visual air will enter on system and it can cause obstruction on sytem,affect the flaper vavle insid compressor an abnormal function sametime flappering noise,second excessive oil on high side that intermittent bock the expansion or cappilary tube the pressure will intermittenly flow to the system,If possible purgrd the system and recharged again,be sure all fitting are connect properly welded,if persist again, and check for warranty whom who replaced the compressor they should attend to this,.thanks alot

Tell them you want a whole new outside system or a new compressor . Around here, the compressor change out should be around 5--$800.00 and the unit change out , around $400.00! OKLAHOMA.

It could be your compressor trying to start but not being able to do so. It shouldnt happen that often but in cold temp the overload protector may cycle that quickly. I reccomemnd to have it checked to salvage the expensive compressor.