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Friedrich Air Conditioner Troubleshooting Guide

Troubleshooting Guides

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Problem Possible Causes Solutions
Air Conditioner is Not Cooling Properly AC on fan mode; Dirty filters; Refrigerant leak Inspect your unit, and troubleshoot
Air Conditioner Keeps Shutting Off Diry air filter or coils; Hot outdoor temperatures Check the error code and troubleshoot
Air Conditioner is Making Loud Noises Issues with broken or faulty components Inspect your unit, and call a technician whenever necessary

Common Problems with the Friedrich Air Conditioner

#1 Air Conditioner is Not Cooling Properly

Friedrich air conditioners are known for their efficiency, so when your AC unit fails to sufficiently cool your room, you know there's an underlying problem with your unit. Check your air filter first. A dirty filter can restrict air flow, causing cooled air to get trapped within the unit. Wash the filter to see if the issue is resolved afterwards.

If the problem persists, check if the cooling operation is set to cool instead of the fan. If the settings are not the problem, then you may need to have one of our licensed technicians check your Friedrich AC for any refrigerant leaks that may be causing your AC unit to blow warm air instead of cold air.

#2 Air Conditioner Keeps Shutting Off

The Friedrich AC unit should be durable, and when the air conditioner is malfunctioning, it means a component within your AC unit is failing. However, short cycling can be caused by a dirty filter as well as filthy coils, or extremely hot temperatures outdoors that your AC thermostat cannot match.

Check the control panel for any error code that may pop up on screen, which would determine the source of the issue. When in doubt, contact us at Luce Aircon, and one of our licensed technicians will inspect your unit for any failing parts.

#3 Air Conditioner is Making Loud Noises

Air conditioners normally have a low, quiet humming or whirring noise due to the fan motor. However, loud noises indicate problems with your Friedrich AC. For instance, a loud, banging or rattling noise may indicate a bent fan blade, or debris rattling around your unit. A squealing noise indicates a compressor problem. Loud whirring means the fan motor is faulty. Determine the type of noise coming from your air conditioner, and have our technicians check your unit.

How to Reset Your Friedrich Air Conditioner

Reset Point: Reset Button

Your Friedrich air conditioner should have a reset button by its power cord built in to allow you to reset your unit after blackouts and power outages. To reset your Friedrich air conditioner, simply press the reset button while your unit is turned off, and wait for 5 seconds. Power on your air conditioner to see if this solves your problem.

Friedrich Air Conditioner Troubleshooting Guide

#1 Repair and Replace Parts

Unless you've had experience repairing HVAC systems, your best option is to have your unit professionally inspected for any repairs or replacements needed on the various internal components in your Friedrich air conditioner.

#2 Check Your Owner's Manual or Guidebook

Your Friedrich air conditioner should come with an installation and operation manual that includes a full list of error codes, as well as a step-by-step troubleshooting guide for the common problems with your aircon, such as frozen evaporator coils, and even a blown fuse.

Cross reference the Friedrich AC error code list with the error code displayed on the indoor unit or control panel. This will allow you to figure out the problem with your AC, and troubleshoot it using the guidebook.

#3 Contact the Professionals

For any aircon issues, contact us at Luce Aircon, and we'll get that problem solved for you! Our services include a deep clean of air conditioners, with chemical wash and chemical overhaul for particularly filthy aircons. Our technicians handle repairs, diagnostics, and maintenance of all aircon units - so you can be sure we'll get the job done right!

Friedrich AC Error Code List

Error Code Meaning
C5 Jumper Cap Malfunction Protection
E1 High Pressure System Protection
E2 Anti Freezing Protection
E4 High Discharge Temperature Protection of Compressor
E5 Overcurrent Protection
E6 Communication Malfunction
E8 High Temperature Resistant Protection
EE EEPROM Malfunction
EU Limit /Frequency Reduction Due to High Temperature of Module
F0 Refrigerant Defects
F1 Indoor Ambient Temperature Sensor is Open / Small Circuit
F2 Indoor Evaporator Temperature Sensor is Open / Small Circulated
F3 Outdoor Ambient Temperature Sensor is Open / Small Circulated
F4 Outdoor Condenser Temperature Sensor is Open / Small Circulated
F5 Outdoor Discharge Temperature Sensor is Open / Small Circulated
F6 Limit / Decrease Frequency Due to Overload
F8 Frequency Decrease
F9 Reduction in Frequency of Due to High Air Discharge
FH Limit / Decrease Frequency Due to Anti Freezing
H0 Frequency of Decreases Due to High Temperature Resistor During Heating Operation
H1 Defrosting
H2 Static Surrender Protection
H3 Overload Protection for Compressor
H4 System is Abnormal
H5 IPM Security
H6 Internal Motor (Fan Motor) Does Not Operate
LC Failure Startup
U1 Malfunction of Phase Current Detection Circuit for Compressor
U3 Malfunction of Voltage Dropping for DC Bus Bar
U5 Malfunction Current Detection of Complete Units

*See our full Friedrich AC error code list here.

Maintaining Your Friedrich Air Conditioner

The Friedrich line of air conditioners is one of the most popular brands of air conditioners highly regarded for their efficiency, durability, and low maintenance. However, the air conditioners will still need some form of maintenance, and our team at Luce Aircon will make aircon upkeep easy for all households!

Give your air conditioner the proper cleaning, maintenance and repairs it needs to stay durable with our full range of air conditioning services tailored to any popular aircon brand and model across Singapore!

Contact us today, and feel the difference with a professionally-cleaned AC unit! 

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Staff Writer

Staff Writer

This article is written by our passionate staff writers who seek to share our knowledge from our business

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