Zoneline ptac compressor won't come on, it just makes a buzzing noise when i turn it on

it depends on thermostat setting. compressor might be going off on a safety.

HI, Take a look on amazon, here: Amazon com sanyo hvac parts. Wish you best of luck. Robert

They used to use a black rubber hose to run from the front to the back of the unit on the very bottom of the unit. You may also look for a styrofoam chute . Make sure the unit is sloped to the rear slightly.

PTAC temp drop should be 20 to 25 degrees across the coil. They never put a service tap on these units. I sell Amana PTACs. You may be alittle low on gas. Check your air TD and that will tell you. The compressor may be overheating due to lack of cool gas to cool the comp. May need a service tech but get a free estimate first. Rus

Full service both coils first ,add your filter, then add a line temperature probe in the supply air flow or on the line going to the compressor add freon till you get the lowest temperature nad then it will start to climb, you've had the correct charge,!

Take the overloads (on top of the compressors ) out the system, and run it now. or just buy a compressor hard start-kit! $10.00!

check for the correct amps from the power source!

My name is brian pfeiffer . I run a ptac business in griffin ga. I have many parts and filters for most all types of ptac units. Please feel free to contact me at brian@dreamgreenservices.com. Nobody can beat my prices!!!! Or call me at 770-233-9987

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.

Most likely you will need to either replace transformer or there may be a low voltage flat type "car fuse" usually 3 amp or 5 amp for just such an occasion. Good luck!