Yes so that indicates high suction pipe temperature, which is most likely low refrigerant, but could be other things, like a compressor failing to start or a clogged txv. I would advise touch nothing and call out the installers asap ! Answer from wolfem16 on reddit.com
Reddit
reddit.com › r/hvacadvice › daikin error code u0 - 00 on a 4 months old system
r/hvacadvice on Reddit: Daikin error code U0 - 00 on a 4 months old system
September 21, 2024 -
Hey all,
Firstly, I've already written the installers. But seeing it's a weekend, I'm unlikely to get anything back until Monday I recon.
Anyways, in short, today, my (relatively) newly installed Daikin HVAC faulted out, with all internal units spewing a U0 - 00 error. I had a google and it looks like the error is refrigerant related. Which makes me worry if its leaking?
I don't know much about HVAC systems, but how risky is it if this is leaking? its R32 gas in there, is it safe to stay in the property for family (and pets) if there is a possible leak on the system?
Top answer 1 of 3
1
Yes so that indicates high suction pipe temperature, which is most likely low refrigerant, but could be other things, like a compressor failing to start or a clogged txv. I would advise touch nothing and call out the installers asap !
2 of 3
1
I too got the same error after the 1 month of installation, seems like there is a leak in the indoor unit coil and the company had to replace the indoor unit.
Blossomaircon
blossomaircon.com › daikin-aircon-error-code-u0
Daikin Aircon Error Code U0: Causes and Solutions – BLOSSOM AIR-CON
May 27, 2025 - Error code U0 in your Daikin AC indicates that the system has detected a shortage of refrigerant. As we know that refrigerant gas is essential for the cooling process. It circulates throughout the system and keep the heat exchange process running.
Daikin error code u0, yes, Not heating, no
I have a daikin heat pump model EHSX(B)04P30D an old model with vertical buttons and I need to find out the codes în order to do the settings. … read more ... My daikin is saying it has a ah-00 error JA: I'm sorry to hear that you're experiencing an AH-00 error with your Daikin system. More on justanswer.co.uk
1
December 5, 2023Daikin Mini split keeps shutting off. Error code U0
Lmao. U0 is the code for low refrigerant. Tell your “maintenance person” to promptly fuck right off, hire a proper licensed tech and get the leak repaired. More on reddit.com
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July 27, 2025Daikin U0 error code my tech and I have tried everything
Following because our tech can’t figure out our U0 error code either. We get the code every 2 days right now. Our tech told us to cut the power by flipping the circuit breaker for 30 seconds then flip it back on. That temporarily fixes it but I’d like a real solution. Getting up in the middle of the night to do this is tiresome. More on reddit.com
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January 26, 2025Daikin 7j-/071 error u0 - low on refrigerant during winter?
Hi! Contact your HVAC installer. This could be faulty machine from Daikin. They are aware of these and have already contacted the suppliers. Did you by any chance recently connect your device into Onecta mobile app? More on reddit.com
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December 23, 2024Does U0 definitely mean a refrigerant leak?
Most of the time it points that direction, but a full diagnosis should still confirm the exact reason the system sees a shortage condition.
beaconsaves.com
beaconsaves.com › blog › daikin-mini-split-u0-error-code
Daikin Mini Split U0 Error Code: What It Means & What to Check ...
Will adding refrigerant fix U0 permanently?
Only if the reason for the loss is corrected first. If there is a leak, the code will come back.
beaconsaves.com
beaconsaves.com › blog › daikin-mini-split-u0-error-code
Daikin Mini Split U0 Error Code: What It Means & What to Check ...
Can I keep running the system with U0?
It is better not to. Low-charge operation can reduce comfort and may stress the compressor.
beaconsaves.com
beaconsaves.com › blog › daikin-mini-split-u0-error-code
Daikin Mini Split U0 Error Code: What It Means & What to Check ...
Videos
16:00
Diagnosing Daikin U0 Error⎪2 - YouTube
04:37
How to Fix Daikin Error U0 | Complete Troubleshooting Guide ...
14:38
Daikin Not Cooling? This Installer Mistake Caused a U0 Error… ...
07:29
Diagnosing Daikin U0 Error - YouTube
Résoudre le code défaut U0 de Daikin
Air Conditioner Daikin - Error U0
Şikayetvar
sikayetvar.com › en › daikin-us › daikin-air-conditioner-shows-error-code-u0-00-and-breaks-down-constantly-how-can-i-fix-this-issue-q-11849
Daikin air conditioner shows error code U0-00 and breaks down constantly; how can I fix this issue? - Xolvie
If your Daikin air conditioner gives you error number U0-00, it means that it doesn't have enough refrigerant, which can cause it to keep breaking down.
Beaconsaves
beaconsaves.com › blog › daikin-mini-split-u0-error-code
Daikin Mini Split U0 Error Code: What It Means & What to Check | Beacon Services & Appliances
A: On many Daikin mini split systems, U0 means refrigerant shortage or insufficient gas.
Şikayetvar
sikayetvar.com › en › daikin-us › daikin-air-conditioner-continuous-breakdowns-and-error-code-u0
Daikin Air Conditioner Continuous Breakdowns and Error Code U0-00 - Xolvie
June 28, 2024 - This error code indicates insufficient gas or no gas at all. It's unbelievable that a brand-new unit could leak gas or that we were sold an inadequate unit. Either way, Daikin has been nothing but disappointing, especially considering its higher ...
Silverback Air-con
silverbackaircon.sg › home › aircon error code › daikin error code › daikin error code 00: ultimate guide
Daikin Error Code 00: Ultimate Guide - Silverback Air-con
December 29, 2025 - The appearance of UA-00 signifies that this diagnostic test has passed without identifying any faults, and the system is ready for normal operation. You will typically see this code flash briefly before it disappears and the unit begins functioning.
U Sin Aircon
usinaircon.com.sg › fix-daikin-error-code-u0-causes-solutions-singapore
Fix Daikin Error Code U0: Causes & Solutions Singapore
September 11, 2025 - If your Daikin aircon suddenly shows Error Code U0, it means that your system is detecting low refrigerant or no refrigerant in the unit.
Call +6590615191
Address 31, Woodlands Close #05-09,, 737855, Woodlands Horizon
JustAnswer
justanswer.com › hvac › mjutb-dakin-unit-showing-error-code-u0-02-does.html
Dakin Unit Error U0-02? Troubleshooting Help & Solutions
The U0-02 error on Daikin units signals a filter clog or airflow issue. Even if recently replaced, dust buildup can trigger this. First, power off the unit and remove the air filter.
Fixurge LLC
fixurge.com › home › daikin › daikin u0 error code: causes, fixes, and how to repair it
Daikin U0 Error Code: Causes, Fixes, and Repair Cost
April 22, 2026 - HVAC technicians can quickly locate the leak, fix it, and restore proper system performance. The U0 error code on a Daikin air conditioner means the system has detected low refrigerant (Freon).
Address 1055 Wilshire Blvd. Suite 900-B, 90017, Los Angeles
JustAnswer
justanswer.com › hvac › l00sp-daikin-support-working-daikin-4mxs36rmvjua-heat.html
Daikin Heat Pump Troubleshooting: U0 Code Fix Guide
The U0 error code signals refrigerant shortage, often from leaks or improper charging. Inspect all indoor units’ refrigerant lines and connections for visible damage or oil stains.
JustAnswer
justanswer.com › hvac › mh5am-i-m-getting-error-code-u0-not-sure-when-moved.html
How to Fix Daikin Error Code U0: Expert Solutions and Advice
July 13, 2023 - The U0 error code typically indicates a sensor or control board communication issue. Start by unplugging the appliance for 5 minutes to reset the control board. Check wiring connections to sensors for looseness or corrosion.
AskWhiz
askwhiz.io › home › blog › privacy policy › cookie policy › terms of service › about › search
Daikin U0 Error Code: Causes & Fix | AskWhiz | AskWhiz
The U0 code means the system has detected symptoms of refrigerant shortage — low suction pressure, high superheat, or an EEV that cannot modulate suction pressure into range — and is locking out before the compressor runs dry. Daikin uses U0 as an early-warning protection upstream of E4 ...
Daikin
daikin.com › products › ac › services › error_codes
Error Codes | After Sales Service | Air Conditioning and Refrigeration | Daikin Global
By checking the error code, you are able to identify the status and the issue of the air conditioner/air conditioning system.
TechFaultFix
techfaultfix.com › home › heating & cooling (hvac) › air conditioners › daikin › u0
Daikin Air Conditioner - Error U0 - Refrigerant Shortage / Undercharge Protection
March 27, 2026 - Learn how to fix Daikin error code U0. Daikin indoor unit runs, but cooling is weak or stops; the outdoor unit fan and compressor do not start or stop shortly after starting.. See common causes and step-by-step DIY repair instructions.
JustAnswer
justanswer.co.uk › hvac › nkype-daikin-error-code-u0-yes-not-heating-no.html
Daikin error code u0, yes, Not heating, no
December 5, 2023 - I have a daikin heat pump model EHSX(B)04P30D an old model with vertical buttons and I need to find out the codes în order to do the settings. … read more ... My daikin is saying it has a ah-00 error JA: I'm sorry to hear that you're experiencing an AH-00 error with your Daikin system.
Reddit
reddit.com › r/hvacadvice › daikin mini split keeps shutting off. error code u0
r/hvacadvice on Reddit: Daikin Mini split keeps shutting off. Error code U0
July 27, 2025 -
We had 3 mini splits installed in our home 5 years ago. After about 2 years, they started showing error code U0, repair person came, found a leak and fixed it.
Now, 2 years later, the 3 units keep shutting off every couple of hours and showing U0 code again. If we flip the breaker, they will work for a few hours then shut off again.
Another maintenance person came last week and said the pressure looked good and it's blowing cold so he didn't expect there was a leak. After a bunch of wandering around and not really taking anything apart, he concluded that there was reduced airflow because there was some dust inside the unit (not the filters that you can take out--those were clean). He said we would need to pay for a maintenance package if we wanted someone to come clean out the units to resolve the problem even though they are under warranty until 2030.
Any ideas what else it could be as I've read that this code could be caused by a faulty valve, compressor etc too.
Top answer 1 of 2
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Lmao. U0 is the code for low refrigerant. Tell your “maintenance person” to promptly fuck right off, hire a proper licensed tech and get the leak repaired.
2 of 2
1
“Under warranty until 2030” i mean you may have a warranty on your car but they dont pay for the oil change usually. Cleaning is maintenance, i’d pay to have it cleaned. But find your manual and look up what the code is and come back here to post it.
Atlas Aircon
atlasaircons.com › fault-codes › daikin-ac-error-code-u0
🔴 Daikin AC Error Code U0 Fixed | Official Troubleshooting & Repair | Atlas Aircon
February 8, 2026 - ... The U0 Error is Daikin’s specific code for “Gas Shortage.” The Electronic Expansion Valve (EEV) opens fully to let gas flow, but the thermistors don’t detect any temperature drop.
Facebook
facebook.com › iAircon › videos › how-we-fixed-daikin-u0-fault-code-aircon-not-cooling-blinking-problem › 2715630971990941
How we fixed Daikin U0 Fault Code Aircon Not cooling & blinking problem | Daikin U0 Fault Code, caused AC not cooling & blinking issues after few minutes of usage. Here's how we checked & rectified for the initial stage of... | By iAircon Singapore Aircon Services | Facebook
Daikin U0 Fault Code, caused AC not cooling & blinking issues after few minutes of usage. Here's how we checked & rectified for the initial stage of...
Daikin
my.daikin.eu › content › dam › DASW › supportavdelningen › Felkoder_SM-TS3errorcode_chart.pdf pdf
Simple Self-Diagnosis by Malfunction Code After Sales Service Division (SM-TS3)
“long beep” sound are error code. 8. Press the MODE button to exit from the · diagnosis mode. The display “ ” means the trial operation · mode. 9. Press the ON/OFF button twice to return · to the normal mode. Note: When the remote controller is left untouched · for 60 seconds, it ...
Skycon Air Pty Ltd
skyconair.com.au › home › error codes › daikin error codes › u0
Daikin U0 Error Code
May 9, 2025 - The U0 error code indicates a refrigerant shortage.