Question about Carrier 38CKC042 Air Conditioner

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Air cond drain line

The line is clear and water runs freely from the disconnect to the out side no problem even blew line out but when float switch is placed back in PVC overflow connection it draws water and shuts system down

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Did you check that it is level

Posted on Dec 13, 2008

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Lennox Elite air handler will run cold for a while, then it will blow warm air out until the safety switch is moved, then it will make a noise in the system which sounds like air hissing, then the cold air...


sounds like installer broke on yellow wire between thermostat and condenser. your switch is breaking the 24 volt signal to cobdensor when the internal float is activated. moving the switch is somehow allowing bobber to drop enough to reactivate 24 volt and condenser comes back on. refrigerant starts to recirculate again and thats what your hearing in the lines. the switch prevents evap coil pan from spilling over into your return when the drain is clogged. use a shop vac and clear your drain. i blow it out with compressed nitrigen. after line is clear prime it wuth 32 oz of water.

Aug 07, 2013 | Heating & Cooling

1 Answer

No 24 v to contactor


The thermostat is the device that determines when the A/C unit starts up. It will require a 24v source (transformer most likely in the air handler) to provide power for the control. If the 24V is present, and the t-stat is calling for cooling, then there is probably a safety device preventing it from starting.

One such common safety device is a water level or "float" switch that detects water level in the pan under the air handler. These are most often found in homes that have the air handler in the attic space. Normally, these pans a dry or have a a few dropsof watrer in them. Condensate is created when warm, humid air is passed over a cold coil. It is collected and routed outside. If there is a problem getting the condensate down the drain pipe in the air handler, it will drip out of it onto the attic floor. This is why a shallow pan is installed under the air handler. The pan will collect the condensate and is piped outside and down to the ground. If the pipe has become clogged - preventing draining - the water would overflow the pan and ruin the ceiling in the space directly below. The float switch prevents the signal from the thermostat from turning on until the water has drained to a safe level.

Check the pan - if it is empty, the switch may have been distrubed and actuated - even though there is no water in the pan. Operated the switch to make sure it can move freely. There may be other safety devices inline like the float switch. You'll need to follow the circuit and find where it is being interrupted in order to make the repair / correction.

I hope this helps & good luck!

Apr 10, 2013 | Heating & Cooling

1 Answer

I have sasui mobile type ari condition uni. there is a problem with water coming out from back side. water not going though drain line. cooling dosent have problem.


Check the elevation of your a/c unit. The elevation at the back should be lower than the front. Test by pouring water from the cooling coil and check if the water you pour goes to the condensate drain line. If water does not comes out, check if it has a small drain pump and a float switch to activate the drain pump. The float switch that does not actuate if water level rises may be the reason why water does not comes out of the drain line.

Sep 09, 2011 | Heating & Cooling

1 Answer

My Mitsubishi Split air air Con leaks water (condensation) when operating. Every month or so I have to clean the water tray of water and blow out the drain pipe. It appears that on indstalation the...


Please note the drain line should be always downwards to flow water freely. Now you lift the indoor slightly from down locked, and take drain line out through any side of indoor. Now just after 6 or 9" after make hole (levelly down) and insert to outside. Or From outside, existing drainline can be run down words. Thanks.

Feb 26, 2011 | Mitsubishi MS09TW Air Conditioner

1 Answer

HOME AIR CONDITIONER LEAKING WATER


your drain lines are backed up and you either have no safety devices or they are not operating properly.

Shut the system down and clear out all your drain lines. If your system has no float switches installed anywhere, then you need to have this done to prevent any more issues.


Jan 18, 2010 | Carrier 38CKC042 Air Conditioner

3 Answers

My Everstar MPK-10CR portable 10,000 BTU's is blinkink P1 all tim


Just got one of these used, and also got the P1 error. Took the case off (which just involved a lot of Phillips head screwdriver turning), and found a sensor switch just to the left of the drain box inside the case. If I press on the sensor switch, the P1 error goes away, but then I get a blinking dot on the LCD display. Pressed the power button after that (while still holding the sensor switch) and it started working again. It looks like it was super-glued either originally or by a previous owner. Just needed to be re-positioned towards the top left corner where the drain pan sits. Just be careful when removing the case to not disconnect any of the wires going to the LCD display.

Sep 21, 2009 | Danby DPAC8020 Air Conditioner

1 Answer

Water collecting when using A/C


My first reaction is that it sounds like a plugged or partially plugged drain line. Clear the drain line by either blowing through it backwards (carefully) or using compressed air. In a worse case the line could be kinked or rotted. Make sure the drain can run freely into its destination. Sometimes the line will need to be disassembled to clean it.

Another cause of this can be static pressure imbalance on the fan...the drain trap should be equal to or just less than in height of the total static pressure of the fan in inches of water column so the water (condensate) is not held back by the fan pressure. Make sure your filter is clean, especially if you have pets.

Apr 20, 2009 | Coleman Heating & Cooling

1 Answer

Air handler will not run clogged up drain?


the air handler is in the attic or in a closet right? most likely the drain switch mentioned is in a pan located underneath the air handler, the switch is actuated when the condensation drain tube is clogged, ( when it cannot drain the water out of the pan), the float switch is actuated and the unit shuts off to prevent any more condensation, thus preventing overflow into your house/apt. the drain line can be sucked out by using a simple wet/dry vacuum of any kind from the end of the drain line ( usually a 3/4 inch PVC pipe located somewhere outside ).

Aug 14, 2008 | Heating & Cooling

2 Answers

A/c unit won't come on


if unit uses a manual switch to turn on suspect it faulty if a circuit board is used the main fuse blew out.

May 17, 2008 | Intertherm Heating & Cooling

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