Home |
Search |
Today's Posts |
#1
![]()
Posted to misc.consumers.house
|
|||
|
|||
![]()
Hi,
I have a strange problem with the home air conditioner. Everyday afternoon, it turns on but does not have the blower fan on. The compressor and the outside unit fans turn on. The vents have no cool air coming out of them and so the house gets warm. I have to come home and turn the thermostat from 'cool' to 'off', leave it for about 5-10 mins and turn it back to 'cool'. Then the AC kicks in and the blower fan turns on. Cool air comes out of the vents and the rooms start cooling down slowly. I checked the thermostat and the fan is set to 'Auto' and not 'On'. Even when I turn the switch to 'Fan On' position the blower fan does not seem to start unless I do as above. The unit is a 8 year old Carrier. Any ideas on what could be the problem? TIA |
#2
![]()
Posted to misc.consumers.house
|
|||
|
|||
![]()
R. Kannan wrote:
Any ideas on what could be the problem? Most likely cause is a bad start capacitor (if the blower motor has one), otherwise it may be new blower motor time. |
#3
![]()
Posted to misc.consumers.house
|
|||
|
|||
![]()
I had a guy look at it. He says the there is low freon in the system and so
the heat exchange are is 'icing up' and not allowing bair blown by the blower fan to get through. I would imagine that if the freon level is low, it will not cool down at all. Why would it 'ice up'? Any truth to what he says? Travis Jordan wrote: R. Kannan wrote: Any ideas on what could be the problem? Most likely cause is a bad start capacitor (if the blower motor has one), otherwise it may be new blower motor time. |
#4
![]()
Posted to misc.consumers.house
|
|||
|
|||
![]()
R. Kannan wrote:
I had a guy look at it. He says the there is low freon in the system and so the heat exchange are is 'icing up' and not allowing bair blown by the blower fan to get through. I would imagine that if the freon level is low, it will not cool down at all. Why would it 'ice up'? Please don't top post. When the refrigerant charge is low the evaporator coil is starved for refrigerant. This results in reduced pressure at the inlet piston or expansion valve, thus allowing the refrigerant to vaporize at a lower temperature - below 32 degrees. At this point the first part of the coil will freeze. Then, since ice is a fairly good insulator the refrigerant will now travel further through the coil before encountering an exposed surface. More ice forms and the process continues. Gradually most or all of the evaporator coil will be covered with ice. This of course blocks air flow through the coil. |
#5
![]()
Posted to misc.consumers.house
|
|||
|
|||
![]()
Travis Jordan wrote:
R. Kannan wrote: I had a guy look at it. He says the there is low freon in the system and so the heat exchange are is 'icing up' and not allowing bair blown by the blower fan to get through. I would imagine that if the freon level is low, it will not cool down at all. Why would it 'ice up'? Please don't top post. When the refrigerant charge is low the evaporator coil is starved for refrigerant. This results in reduced pressure at the inlet piston or expansion valve, thus allowing the refrigerant to vaporize at a lower temperature - below 32 degrees. At this point the first part of the coil will freeze. Then, since ice is a fairly good insulator the refrigerant will now travel further through the coil before encountering an exposed surface. More ice forms and the process continues. Gradually most or all of the evaporator coil will be covered with ice. This of course blocks air flow through the coil. Thanks for the explanation. I guess the reparman was right. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|