Major room temperature swings
If room temperatures vary more than 3 degrees between when the air conditioner turns off and on all over again, it usually means that the heat pump isn’t cycling on frequently enough. Room temperature goes too low In case the room temperature falls lower than the fixed temperature on the thermostat, it generally indicates that the thermostat is inappropriately calibrated or mounted where it doesn’t feel an appropriate sample of room air. 
Air handler squeals
Squealing noise from a forced-air heat pump usually appear if the belt linking the engine to the ventilator slips. In case a blower makes a grinding sound, turn off the unit and consult a heat pump repair expert.
In the majority of cases, the belt is inappropriately set or worn and requires substitution. Pursue the recommendations from your manual (in case you have no one, contact the producer and ask for one).
That job embraces removing the access pane, loosening several bolts, which grip the blower engine at the appropriate tension and resetting or changing the belt. In most cases it is better to change it and purchase a new one at the hardware store. When remounting the belt, be watchful not to over-tighten it – that can damage the engine bearings.
Water pools next to air conditioner
Air conditioners together with highly efficient combustion furnaces cause considerable condensation that goes out through a plastic drain pipe. That has to go into a floor drainer or be taken away by a little “condensate pump.”
In case the water is accumulating at the base of the unit, something can prevent the water’s flow or seeping, or the pump can not be operating.
1. Check if one of the lines is seeping. If it is, change it.
2. Check the condensate pump by placing water into its pot. In case the pump doesn’t go on, it is either receiving no power or is out of order. Make certain it’s plugged in and check
the circuit. If it is out of order, have it fixed or changed.
3. In case the pump operates, but doesn’t empty the pot, the ball-like check bibb just before the outlet pipe is possibly trapped. Unbolt the check bibb and loosen the ball within it.
Search for an impediment. If it finds out that a condensation drain pipe is blocked with algae, clean it if possible (it may be necessary to cut it and change later with a clutch). Put the wire through it to purify it. In order to eliminate algae, use a dilute solution of bleach through the line.
4. Apart from an air conditioner, ice may be clogging the line. If it is so, make certain the filter isn’t filthy. In case the filter is ok, perhaps the air conditioner’s refrigerant is low.
Air ducts are noisy
A lot of heating lines are made of metal, so they conduct noise from the air-handling unit into your rooms. To eliminate the transmission of sound, you may have a heating expert add flexible insulation ducting between the heating system and the ducting runs. In case you have taken notice of a pinging or popping noise appearing from the ducting, which may be aroused by thermal expansion or by air flowing past a loose flutter of metal. Path along the line runs, listening to the noise. In case you discover it, make a tiny dent in the sheet metal to supply a more firm surface, which is less inclined to move as it cools and heats.
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