Why does my air conditioning pipes freeze up so much?

Question

If my air runs for too long at my home, the pipe freezes up (even when it's 90 degrees out!) and cold air no longer blows...what's wrong and what can I do to fix this?

Answer 1

You are low on refrigerant, call an ac company to check for leaks then top it off. Technical term is the refrigerant is flash gassing inside the bigger (suction) pipe before it gets to the inside coil (evaporator).

Answer 2

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RE:
Why does my air conditioning pipes freeze up so much?
If my air runs for too long at my home, the pipe freezes up (even when it's 90 degrees out!) and cold air no longer blows...what's wrong and what can I do to fix this?

Answer 3

1st check filter replace if dirty
2nd If is belt driven make sure belt is good and adjusted correctly 1/4 inch deflection from center
3rd make sure all the supply registers are open
4th make sure there is nothing blocking the return grill that could restict the air flow
5th make sure all the covers are fasten securely on the unit so there is no air bypassing the indoor coil
6thwhat temperature are you setting the thermostat for setting the stat too low will cause it to freeze up do not set below 68 degrees
the rest of the problems need to be troubleshot by a qualified service tech
is the unit sized correctly,problems with the metering device,low on charge,evaporator plugged solid with dust and debris(if there is no filter on the unit this is the most likely cause) running the system at low ambient (outdoor temp below 60 degrees)

Answer 4

Likely cause: your filter and/or evaporator are dirty, solution change filter and/or clean evaporator. (this is the inside unit, closet, attic space or garage.

but may also be: low on refrigerant, if so you will need a tech to check pressures and leak check. But do the above mentioned first. Good luck.

p.s. dont set your thermostat lower than 68 degrees, the room temperature will likely not get that low, the unit will run forever and eventually ice up if the heat load of your conditioned space drops too low.

Answer 5

You could be low on refrigerant, or it could be a dirty filter.( they should be changed every month or so). But it could also be your drain line trap. The main unit should have a trap in the drain line. The line is a half or three quarter inch pvc pipe with a small drop in the line to catch sediment. If the trap gets full, the condensation backs up & fills a large catch pan that the main unit sits in. When that catch pan fills, it trips a sensor & shuts off . The unit will continue to try to cool, & that`s why the coils ice.

Answer 6

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My educated guess is LOW FREON. The unit is struggling to cool and keeps running and running and cannot cool because of almost no freon. This happens to our 5 ton heat pump about every two years. Just had ours refilled 6 weeks ago. It works perfect after it is filled and the drain line is blown out. Being in Florida it is a requirement. Call a dependable repairman.

Answer 7

Hey Q, you have 2 options:
1/ clean your dirty return air filter if it is dirty
or
2/ if the filter is clean, repair your A/C unit by calling a air conditioning tech. You most likely have a refrigerant leak.
Good Luck :)

Answer 8

Low air flow over the indoor coil, dirty filter, clogged evaporator, or low on refrigerant. You can check the filter and evaporator, a pro will need to investigate if the system has a leak and needs to be recharged.

Answer 9

Some possibilities are your expansion device (piston, cap tube, or TXV) could have failed. You don't have enough air flow over the evaporator coil. The system is low on refrigerant.

Answer 10

it sounds like one of two problems first take a/c out take top off and clean all coils then put back together if that is not the problem then it is low on freon if low on freon then you need a repair man