Help with split sysytem

has the system air filters been serviced lately
is the system circulation fab been cleaned to allow full air circulation of the system
call in a technician to check for vermin infestation preventing the system from working properly

because you have the temperature set at 28 degrees celcuis . Change the temperature to 18 degrees and it will cool 28 is hotter
It is a reverse cycle air conditioner it will warm the room if you set temperature to 28 degrees . Set it lower and it will blow out cold air.
Have exact same air conditioner as I recognise the remote control.
point it at the air conditioner when altering the temperature setting.
Check under the slide compartment also on the remote for more advanced settings.

Hello friend, thank you for your inquiry!

I understand that your Frigidaire air conditioner is not blowing cool air. There could be many possibilities to why your appliance is not cooling properly.

· Check to make sure the air vent is not in the open position.

· Make sure there is nothing blocking the airflow of the appliance.

· If your appliance is turned on in a hot room it could take additional time to remove "stored heat" from walls, ceilings, floors, and furniture.
Is your appliance under warranty? If so, you might want to reach out directly to the manufacturer to determine the coverage on your air conditioner and the procedures to any potential remedy. I hope this is helpful. -Matt

Your statement in it-selves solve the problem.
Your vehicle cooling system and air-conditioner system work independently.
Your vehicle cooling system is driven by the v-belt that turns the water-pump and circulates the coolant within the engine through the radiator and back into the engine and flow is controlled by a thermostat.

Your vehicle air-conditioning system operates from a v-belt that drives an air-conditioning pump which circulates coolant through a sealed system and generates cold air completely independently from the engine cooling system.

It seems that you need to repair the engine cooling system which has a fault and this fault could be
a) combustion seeping into cooling system (blown gasket),
b) cooling fan not operating (this fan engages at specific engine temperatures and suck cold air through the radiator in order to cool the engine coolant as it passes through radiator veins),
c) faulty cooling thermostat (thermostats work mechanically and through temperature expands and opens the water circulatory channel / opening, and in cold weather restricts this opening in order for coolant to allow engine to reach operating temperature and then allows the coolant to circulate freely),
d) engine combustion could be too hot due to fuel mixture discrepancies (too lean) thus overheating the internal combustion process which will overheat coolant,
e) engine cooling system leak causing the system not to seal thus restricting the pressurised coolant circulatory system (the system needs to be pressurised for effective circulation as well as raising the boiling point of coolant (under pressure water would boil at 110 degrees Celcius instead of 90 degrees Celcius).

Hope you find the problem soon as overheating is detremental to the engine and all integrate parts associated therewith.

if your talking heat pump yes. heat pumps only work down to about 40 degrees ambient. you getdown to 19 it needs heat strips or auxilarry heat of some source.

2000 Nissan Altima Heater Air Condition Section HA 76 pages Here is factory service repair manual for your vehicle . Do you know how to do testing on these system ? Automotive electrical system testing ? How to read a wiring diagram ? When hot outside is the inlet pipe to evaporator freezing up ? Do you know where this is , under the hood in the engine compartment at the fire wall . What are gauge readings , Is the compressor engaging ? Were any switches replaced ? Ambient temp. , thermal transmitter switch . pressure etc...

First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is worm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest to flush the heater core.

First you have to identify what causes the problem.
To do this you have to:
1) When engine is cold check the level of coolant. If it is low fill it up.
2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is warm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest flushing the heater core.

have you checked the coolant level on the rediator?if its low you wont get alot of heat

to tricked the thermostat only a way i know,to put on it an ice cube for a while.propably wrong choice to installed roof unit you must installed to the floor better for the ac and to you