Question about Heating & Cooling

1 Answer

Can a clogged return air filter cause the compressor to ice over?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 82 Answers

Yes! This is one of the most common reasons for evaporator and compressor freeze-ups. Change them at least 4 times a year. Second most common reason is closed dampers at registers or blockages at return air.

Posted on Jun 27, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My unit does not go on. I press the on button and hear it then 10 sec pass hear it but it doesn't light and red light doesn't go on and then it shuts off


tep 1: Check the thermostat
  • Make sure that your thermostat is set to "cool" and not "heat" (if it's set to heat, your AC won't turn on no matter what).
  • urn the temperature setting 5 degrees below the current temperature to see if your AC will turn on.
  • No good? Then you need to...
tep 2: Check the air filter
  1. Find your return vent's filter (the return vent is where air gets sucked into the air conditioner).
  2. Check to see if the filter is dirty (if you can barely see light coming through it, it's too dirty).
  3. Change the filter if it's dirty.
    "Wait, why am I doing this?"
    A dirty air filter blocks air from returning to the AC, reducing airflow over the evaporator coil, causing it to ice up.
    This causes a low-pressure switch to trip and shut down your AC's compressor (the heart of your air conditioner) to prevent it from being damaged.
    So you need to change the air filter to prevent all that.

Sep 28, 2016 | Heating & Cooling

1 Answer

Front grill


Check the air filter and if it is dirty, replace..
Turn equipment off and let the ice melt.
After ice melts, place a/c in cooling mode and set the thermostat to 3 degrees below room temp display.

The indoor unit fan should start blowing cold air immediately and then turn off once the room temp drops one degree below the cooling temp setting.
If the indoor unit does cycle off, check the outdoor unit and make sure it turns off at the same time.
If the outdoor unit continues to run and the indoor fan is not running, the indoor unit will ice up.
A defective compressor relay that is stuck in a closed position will cause icing of the indoor unit because it keeps the compressor running when it should turn off with the indoor fan.

Do you have an error code being displayed on the controller?
Is there an led light that is flashing on the indoor unit?

Another possibility causing the indoor unit to ice up is if the freon in the system starts to get low.
Make sure the ice has all melted for this next check.
Pretty easy to check without special tools.
If the air filter is clean and there is no dust/ dirt blocking the fins on the indoor unit, turn a/c back on to cool and check that the indoor unit fan comes on and is blowing air good.
Once everything seems to running good go to the outdoor unit.
There will be two lines with black rubber insulation covering them.
Peel back the insulation three inches on each line and observe the copper lines.
If either line starts to frost up the a/c system is most likely low on refrigerant.


Another cause of indoor unit icing could be that the aluminum fins behind the air filter are clogged with dust or other foreign material.
This would block the air that must be pulled in causing the indoor unit coil to become too cold due to lack of air flow and it will ice up.

Operating the cooling system when the outdoor temperature is below 60 degrees can cause the indoor unit to ice up also.

I'm Robert.
Florida certified a/c contractor. 30 years experience.
Hope this helps.


Mar 18, 2014 | Fujitsu Heating & Cooling

1 Answer

Ice machince is going max freeze cycle shut down


1. Possible cause. Water leak. Check purge valve, water curtain, sump, sump hose.
2. Air filters clogged. Clean air filters.
3. Dirty condenser. Clean condenser.
4. Restricted location, intake air to hot. Have machine moved.
5. Ice thickness sensor dirty or disconnected. Check ice thickness sensor probe.
6. Water distributor dirty. Remove and clean water distributor.
7. Inlet water valve leaks through during freeze cycle. Check water inlet valve.
8. Connected to hot water. Check for bleed through from missing check valve in building water supply.
9. Incomplete harvest. Check harvest system.
10.High pressure cut out opened. Check fan motor pressure control, check fan motor, check controller using test mode.
11. Fan motor pressure control open. Check fan pressure control.
12. Fan motor not turning. Check fan motor, check fan blade,check controller using test mode.
13.Water pump not pumping. Check pump motor,check controller using test mode.
14. Pump hose disconnected. Check hose.
15. Compressor not operating. check compressor contactor, check controller using test mode.
Check compressor start components, check PTCR resistance and temperature, check compressor voltage, check compressor windings.
16. Low refrigerant charge. Add some refrigerant and restart unit. If cycle time imporves, look for a leak.
17. Hot gas valve leaks through during freeze. Check hot gas valve for hot outlet during freeze.
18. Thermostatic expansion valve bulb loose. Check bulb.
19. Thermostatic expansion valve producing very low or high superheat. Check evaporator superheat, Change TXV if incorrect.
20. Compressor inefficent. Check compressor amp draw, if low and all else is correcy, change compressor.

Sep 28, 2013 | Scotsman Ice Maker CM3 30inW Cubed Ice...

1 Answer

Outside heat pump froze up, turned it off to thaw,, now what happens


Clean the coils inside and out side coils first, check on closed ducts, blocked return air, thermostat set below 72 degrees all these things and of course low charge could cause it to ice up.
If the compressor is iced check on the above and correct, clean coils are a must, they may look clean but they usually are not, most people use cheap air filters and the fins dust and dirt goes right thru them and starts loading up the coil. Good luck

Jul 09, 2011 | Heating & Cooling

1 Answer

Our Quietmaster 's cooling works for a while and then doesn't.


Remove the front cover and make sure the temp sensing wire is in place on the front of the evaporator coils. If it has fallen and is touching the evaporator plumbing the unit can preform as you described.

Also check for signs of icing / ice build up on the evaporator coils after the uint has run for a couple of hours. Ice build up will also cause this symptom. IF you do find that the unit is icing up that can be caused by:
1. A very dirty evaporator
2.. A clogged Air filter
3. Contaminated by internal plumbing debris / clogged freon passages
4. A blower Fan motor running to slow.
5. Freon Pressure and return lines touching together usually either on the side of the unit or just behind the center chassis air wall enroute to the compressor.
6. A corroded electronic control board.

As you can see above there are several things that can cause the symptom your described. It cetainly sounds as if you either have an icing problem or a control board problem.

The next time the symptom occurs... place the unit of fan only for at least 30 minutes and then see if you can switch it to cool, and actually have it cool. If it does cool properly after switching to fan only for 30 minutes you most likely have an icing problem.

Thanks for using FixYa.

Kelly

Jul 20, 2010 | Friedrich QuietMaster Electronic SS12J30D...

1 Answer

My condensor in the furnace ices up which restricts the airflow. Is this normal. When I shut off the air conditioner the ice melts and causes a minor flood in the furnace. thanks


The indoor coil or "Evaporator Coil" (condenser is the outside coil in air conditioning) should never freeze when an air conditioning system is installed, maintained and serviced properly.
The most common cause of evaporator freezing is a clogged or dirty air filter. Other causes include; a clogged or dirty coil; blower malfunction, filter too restrictive (in which case use a less restrictive type), undersized duct, closed and or covered registers and grills, and collapsed duct.
Another common cause of evaporator icing is loss of refrigerant in which case you should call a professional who can locate and repair the refrigerant leak and recharge your system.

Jun 25, 2010 | Carrier 38CKC036 Air Conditioner

1 Answer

I have problem of freezer . we have compressor +condenser unit of 13 HP , there is ice formation on evaporator coil and consequently on compressor


Turn it off & let defrost.You have a clogged air filter or low freon/leak.leave fan in "on"setting at thermostat.

Mar 16, 2010 | Carrier 38CKC042 Air Conditioner

1 Answer

Compressor shuts down every 5 minutes or so. filters are clean


Shut down of compressor is triggered by thermostat, or overload protection inside the motor compressor.If there is an ice accumulation sensing/low temperature caused by clogged air flow, the system will shutdown. The air con must have cleaning, or the thermostat is defective.If the shut down is caused by overload protection, there might be a clog on the system tubing or the compressor need replacement.In rare cases the start up device (relay or PCT) may also cause that trouble.

Aug 31, 2009 | Sharp Heating & Cooling

4 Answers

Goodman CKL60-1L


Four things cause icing up:
( 1 ) Is your filter clean? dirty filter blocks air flow causing iceing up. replace filter
( 2 ) Do you hear the Indoor fan running? If the fans not running the unit ices up. Check Capacitor to fan if good.
Bad fan motor... replace fan motor and cap. If both good
( 3 ) Check Air Handler evap coil if dirty and or clogged, restricts air flow causing unit to ice up. Use toilet brush to clean.
This is always a big possibility if you have pets.
( 4 ) If the above are not present then you are low on refrigerant.
Low refrigerant will cause icing up because the gas does not flash properly. This will require a service tech.
refrigerant leaks can be as simple as a loose cap on the king valve, leaking schrader core, to coil leak.
Have the service tech show you the leak. If it is in a copper line it can be fixed. If the system is over 10 years old limit the amount you want to spend. 10 years is the standard life expectantcy anymore. Good luck

May 20, 2008 | Goodman CKL60AR60 Air Conditioner

3 Answers

Friedrich air conditioning - inside unit ice build up


Hi, Reduced air flow, low on freon or being continuously run during cooler weather such as at night. Some people turn their thermostat on 60 thinking that it will help get it cooler faster. They freeze up at night and don't get a chance to thaw during the day. It needs set no lower than 75 or so. The evaporator may be dirty. Don't know a lot about your particular unit but if the outside unit has the compressor and refrigerant lines running to it, The large refrigerant line should sweat all the way to the compressor if its fully charged. Please rate me if I have helped. Good luck kstfas

Aug 28, 2007 | Friedrich M18CF Split System Air...

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

98 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

paulcarew

Level 3 Expert

2463 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Donni Steen

Level 3 Expert

659 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...