GE zoneline - about 23 years old

Could be lack of service. The unit depends on a clean evaporator and condenser coil. The "other" motor you hear is the compressor starting or stopping probably due to either a high pressure or low pressure switch, or thermal cut-out.

most wall unites will fit any whole they even have curtain to fill in the whole. 40 years old that old!

GE Zone have two boards Drive board and control board. Sounds like bad fan motor. I work on Zonelines and the motors go out more than anything else. Rusty

Check out these three main causes of a portable/room unit's failure:
http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Home_Improvement_Zone_Cooling_Ventilation_Systems_Portable_Room_Air_Conditioners_Window_Air_Condit_Not_Turn_On.htm

Brad

Might be the compressor. It would be a good idea to shoot it with some compressor oil.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

take contuity tester to test heat protecters and inline fuse in coil area /could be that you might have to change main board

Hi Laurelrobin,
When the unit is on "low fan", it is fan only, and is recirculating room air. If the damper is open, it can also bring in outside air. If the space is not occupied for extended periods, it's OK to turn the unit "OFF", as long as you have a newer unit with Heat Sentinel, and the Heat Sentinel is turned on. Heat Sentinel will not let the room temp get above 85F, as long as the unit is OFF. Also, in most cases it's best to keep the damper closed. You can check your owner's manual for more info on the Heat Sentinel and other auxiliary functions. I also have an article on the temperature limiting functions of the GE Zoneline.

Feel free to contact me at greg.mcnary(at)airdistributors.com if you need further info.

Greg McNary
Air Distributors Company, Inc.
Louisville, KY
Distributors for GE Zoneline PTAC Units, Zoneiare PTAC Units, and McQuay PTAC Units.

Heat pumps have saftey circuits that prevent liquid flooding of the compressor. Inadequate airflow across the evaporator in cooling can trip this circuit. Have your package unit serviced with particular attention to cleaning the evaporator coil and be sure your filters are clean and changed frequently in the summer months. Hope this helps GL!

no you problably have a bad thermostat on the unit

could be problem with either switch of fan. try continuity across both legs of the switch then try continuity across the fan windings.