20 Most Recent Carrier XHB123D X/Y Series Heat/Cool Air Conditioner Questions & Answers


Condensation leak on downflow AC system

It sounds as though the ac has done this for a long time,may be since it were new.Does it cool good when it is on?Or does it take a long time for it to do the job?I am thinking,from day one the ac unit was charged,incorrectly,There is air in the system,and not the proper amount of freon.This would give a tech.a false reading if he where to attach ac gauges up to read pressures.It has happened before.The ac units are charged with a machine,and between freon and the machine it traps air,and pushes it in the system.The machine is set to a certain amount of freon to charge.When the machine senses that amount of freon has been injected into the unit,it shuts off.My advice would be to evacuate and recharge the system to spects,with manual gauges.This would assure the right amount of freon,and the tech.would be able to do this with his eyes closed,and know it is done right,ac men know there gauges,I know,for I am one myself.Let me know some feedback on this [email protected]
7/23/2022 10:55:04 PM • Carrier XHB123D... • Answered on Jul 23, 2022

Pressure, draft safeguard, or aux limit swtch did not close or re

The limit switch on the inducer has tripped. There are two wires that go to a small disk about the size of dime that has a small button in the center. Push this little button and you will feel a littl snap and the unit should fire up. Check all the manual reset limits as well. If the unit still won't start, jump the two wires by bypassing the limit switch. If it starts, then replace the switch. Bypassing the switch is only temporary and could lead to death if it is used as a permenant fix.
1/29/2021 10:51:54 PM • Carrier XHB123D... • Answered on Jan 29, 2021

Carrier ac unit

This appears to be a Roof Top packaged unit. You will definitely need some help with this install. Your local Carrier distributer should have the installation curb kits and economizer etc.

Here is the most technical data I can find for this unit. Under the 50TFF section you will see the accessory dimensions. I hope this helps. (You will need adobe acrobat to read the file)
11/8/2020 4:06:01 AM • Carrier XHB123D... • Answered on Nov 08, 2020

WRAC has E4 on display

E4 means return air sensor error, if the error cannot reset may be the return air sensor is out of range or defective. But if the sensor is ok you need to replace the control board itself. The reading of return air sensor is 8k to 10k ohms @ 25deg. C temperature.
7/21/2020 6:28:08 PM • Carrier XHB123D... • Answered on Jul 21, 2020

Carrier model 58sxa080-gg series 100

the flame detector rod is dirty? try cleaning with sand paper and scraping also. there should be a small amp. reading threw wire coming from flame detector rod. in milli amp range. increases when running. some times i use a jumper to hold gas valve on once started to allow time to test amps.
4/2/2019 6:22:29 PM • Carrier XHB123D... • Answered on Apr 02, 2019

Error code 23 - Pressure Switch did not open My

Its probably a bad pressure switch where the contacts did not open when the exhaust fan shut off. Check the pressure switch ports and verify there not blocked.
3/24/2018 6:31:14 AM • Carrier XHB123D... • Answered on Mar 24, 2018

Hi, I have no power coming to the weather maker...

double check the breakers. Turn ALL THE WAY OFF, then ON. If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_092728000e6acb79
10/22/2017 4:13:30 PM • Carrier XHB123D... • Answered on Oct 22, 2017

Hello, have a Carrier Heating and Cooling,

I'd like to help but need more information if you could tell me the cycles that took place i can further assist you. 1 inducer motor comes on 2 pressure switch was made 3 ignition started 4 gas valve opened burners lit etc..
9/20/2017 1:38:29 PM • Carrier XHB123D... • Answered on Sep 20, 2017

Not operating

switch is probably bad
9/6/2015 10:30:23 PM • Carrier XHB123D... • Answered on Sep 06, 2015

Asking about air conditioners


There are many manufacturers out there in the market place. Electrolux is one of the respected name brands. I personally own a few of there products and have been satisfied.
9/6/2015 12:24:49 AM • Carrier XHB123D... • Answered on Sep 06, 2015

No manual for a cool 438656

Recent Carrier Xhb123d Xy Series Heatcool Air Conditioner ...

domecrel.com/recent-carrier-xhb123d-xy-series-heatcool-air-conditioner/ Download Your Carrier Manual - Oge. Recent carrier xhb123d xy series heatcool air conditioner Heat ?^' enables the heating equipment to operate as needed.
8/7/2015 1:39:38 AM • Carrier XHB123D... • Answered on Aug 07, 2015

Gas furnace continually running

Is the blower operating and are your air filters new

2/28/2015 8:52:46 AM • Carrier XHB123D... • Answered on Feb 28, 2015

Not cooling enough. frozen from capillary tube up

Frozen from the capillary tube to the top two rows of the evaporator is an indication of a refrigerant leak. Depending on the age (5 years or less) this repair is covered by the factory warranty. If older it must be done by an EPA Certified Technician. Make sure it is pressureized and properly tested for the leak. Do not let them use "Super-Seal" I personaly am aginst this product as nothing should be used except refrigerant, oil, and "Dry Charged Nitrogen" (used to build pressure).7_31_2011_5_47_51_pm.jpg
1/27/2015 11:40:12 PM • Carrier XHB123D... • Answered on Jan 27, 2015

Why your unit is freezing up.

To understand why your AC or heat pump is freezing up, it helps to know how your system works.

There are 7 major parts to an AC system, 9 with a heat pump.

1 - Condenser/heat pump (The outdoor unit)
2 - Air Handler (the indoor unit unless the system is a package unit, then all is outside in one system. The air handler is usually found under the home, in an attic, or in a closet.)

In the condenser are the following major parts.

3 - Compressor
4 - Condenser coil
5 - Condenser fan
6 - (HPs only) reversing valve

In the air handler are the following major parts.

7 - Blower motor
8 - Evaporator coil
9 - (HPs only) electric heat strips

Some systems known as "dual fuel systems" use another heat source in place of the heat strips, usually a gas furnace. I will address gas furnaces in another post.

When an air conditioner is operating properly several things are taking place.

1 - The compressor is compressing or "pumping" refrigerant through the system.

2 - through changes in pressure, the refrigerant makes the evaporator coil get very cold, and the condenser coil gets very hot.

3 - The blower motor/fan circulates air across the evaporator coils, as the room temperature air (Also known as "indoor ambient") goes through the cold coil, it exits, cooled approximately 15 to 20 degrees cooler than when it entered. (In a ducted system, the blower is also the fan that circulates the air throughout the home.)

4 - The condenser fan circulates air across the condenser coils. As the outdoor air goes through the condenser coil, it removes heat from the coils that are very hot. This in turn removes heat from the refrigerant so it can run its cycle again, and through pressure changes, cool the evap coil.

5 - With a heat pump, the reversing valve reverses the flow of refrigerant in the condenser and evaporator coils.
In AC mode, the evaporator coils get cold, and the condenser coils get hot. But in heat mode, the evaporator gets very hot, and the condenser very cold.

Now, whichever coil is getting cold will freeze up if there is inadequate air flow across the coil, as the refrigerant in it is far below freezing, and there is not enough airflow to keep the humidity in the air from freezing on the coil.

Things that can cause poor airflow are,

1 - Dirty/clogged coils
2 - dirty/clogged filter (will only effect evaporator coil)
3 - Closed/blocked vents (will only effect evaporator coil)
4 - Malfunctioning or dirty fan

Low refrigerant will also cause a coil to freeze up, reduce efficiency and cause the system to run for long periods of time. Not to mention, shortening the life of the unit.

With a heat pump, in heat mode only, the condenser (outdoor) coil will routinely begin to freeze up in cold temperatures. This is due to the fact that the refrigerant is below freezing, and the cold outdoor ambient temp is not warm enough to keep the condensation in the air from freezing on the coil.

Note, a properly working AC should never freeze up.

A heat pump is equipped with defrost controls to prevent ice buildup.
Some are controlled by timers, some by temp.

When a HP is going into defrost mode, the condenser fan shuts down, the reversing valve reverses the flow of refrigerant and the once cold condenser coil now gets very hot, defrosting the coil. (Many people have said this process sounds like the unit is coming apart, or about to explode and are frightened by the "smoke" which is really just steam from melting ice that comes off the unit.)

During defrost mode, the secondary or "auxiliary" heat comes on to ensure that you are still getting warm air from the vents. (Again, this can be electric heat strips or a dual fuel system)

If you are experiencing cold air from the vents during defrost, that means your auxiliary heat is malfunctioning.

The auxiliary heat is used for three purposes.

1 - during defrost mode to maintain warm airflow (automatic)
2 - when the HP cannot maintain the set temp due to extreme outdoor temps. It comes on when the indoor temp drops several degrees below the set temp on the thermostat (automatic)
3 - For emergency heat source when the HP is not working. (Manual)

To recap....

Iced up coils?

Poor airflow
low refrigerant
Malfunctioning fan
failing defrost system

There are two things that can be done in a pinch to help de-ice frozen coils. This may get you by until the repairman can get there, or you can fix the system if you are a do-it-yourselfer.

HPs frozen outdoor coil in heat mode, not going into defrost?

Cover most of the vents, and turn the system onto cooling mode until the outdoor coil is thawed. then uncover vents and return to heat, or emergency heat. (this usually takes 15 min or less)

Frozen coils in AC mode with a heat pump?
Turn the system to heat with the thermostat on just high enough to get the system to come on. (again, usually takes 15 min or less to thaw.)

AC only, with frozen evap coils? (this can sometimes be seen frozen all the way outside to the compressor on the copper lines.)

Turn the system off, and the fan switch from "auto" to on".
This will usually defrost the coils within 1 to 2 hours.
(If your system has the furnace in line before the evap coil, turn the system to heat, and the furnace will defrost the coil within minutes.)



My weathermaker started making a screeching noise and intermittantly would shut down, without blowing any heat. I found the sediment trap clogged and the induction motor was churning through the backed up condensation water. This slowed the motor down and the pressure switch would not stay closed. Unclogging the trap and hoses solved the problem. A bunch of water came out when I disconnected the collector box drain hose, along with gobs of sticky crud. Works great and is quiet now.
11/8/2014 3:36:32 AM • Carrier XHB123D... • Answered on Nov 08, 2014

My blower motor doesn't blow air out the air ducts why

Check for a frozen cooling coil. Turn the fan to the on position at the thermostat and the cooling to off. Your cooling coil may be iced over. Allow it to run in the fan only mode until the coil has had a chance to defrost. At the outside unit you may see the large line is frosted. This is the visual indication for a frozen coil. When you return the A/C to cooling use it with the fan on while in the cooling mode.
10/24/2014 12:01:50 AM • Carrier XHB123D... • Answered on Oct 24, 2014


Check the draft inducer motor for any partial blockages or dibri.

I've seen sticks, birds nest particles and pieces of deteriorating fan blades (squirrel cage type fans) cause this.

You might also find that the inducer motors bearing are going.

If its a loud vibrating grinding type noise, I'd suspect bearings or missing pieces of the blades. (unbalanced)
If it's a clanking type noise I'd suspect loose items hitting the fan.

The inducer motor will only operate right before and during burner operation, while the blower motor can operate at any time depending on your setting.
8/22/2014 6:14:40 PM • Carrier XHB123D... • Answered on Aug 22, 2014

Carrier furnace weathermaker 8000

. Several times of recyling power normally brings the furnance up. Though the failure code has always been 31, there are several different behaviour when the blower starts after reset :
a. blower simply creases.
b. there is an attempt to start the heating unit (I hear the high pitch noises), then everything stops.
c. there is an attempt to start the heating unit (I hear the high pitch noises), once I see the orange glow from the coil, normally the gas is lit up and the unit starts working.
7/25/2014 5:29:13 PM • Carrier XHB123D... • Answered on Jul 25, 2014
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