Unit will work in other modes as well as cooling but when i switch it to heat mode the unit outside stays on and continues to freeze some visible pipes but does not blow any air in the house. what would be broken. please help its driving me crazy and would like to try and fix it myself if possible.
Firstly is the air comming from the outdoor unit cold or warm? if it is cold then the 3way valve is working and it has changed to heating. If it stays warm then it is still in cooling mode. The indoor fan wont come on until the coil temp gets warm enough, ( so it doesnt blow cold air on you straight up). If it is changing into heat mode then the larger of the pipes connected to the outdoor unit should get warm/ hot. If this is not happening then the unit is either out of gas or the compressor is on hollidays and wont come back to work.
SOURCE: Not heating
Yes, the reversing valve has a separate coil. some energize on cool mode, some on heat mode. Has the thermostat been replaced? I find this a common mistake.
SOURCE: Problem with GE Zoneline 5200 model
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!
SOURCE: Hitachi model number unknown !! (faded 0ff unit)
dirty unit and need for cleaning
clogged up expansion valve
defective fan motor
deffective air sensor
SOURCE: Heated air coming out when unit is in Cool Mode
Heat pumps are sometime constructed to "Fail in the heat mode." It could be either the t'stat or the reversing valve. Be sure the t'stat is wired correctly. Usually the"O" terminal is for the reversing valve on the outdoor unit.
SOURCE: 18 year old Janitrol Heat Pump freezing up.
i would get someone to check your refrigerant levels have you ever had the evaporator coil flushed and cleaned? proper refrigerant levels and proper airflow across coils are extremley important not to scare you but 18 yrs is a long time on a heat pump 9-12 years is the point where they really loose there efficiency going for a newer one would probably cut your operating cost in half if not more depending where you live there are a lot of people not familiar with heat pumps so i suggest finding a company that specializes in them to service your unit
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