Glastender Bar Refrigerator Error Code AtHi: Temperature Alarm Code
AtHi is a controller code in the Glastender manual's temperature alarm group. The manual lists two causes, a dirty condenser coil and a refrigeration system that needs service, and gives no written definition. Clean the condenser coil, and call for service if the code returns.
Medium: the cause may be as simple as a dirty coil, but rising temperature puts stored product at risk.
- Code
- AtHi
- Maker
- Glastender
- Equipment
- Bar refrigeration
- Applies to
- C1SB, C2SB, C1SL, C1SU, F1SB, F1SL with digital controller
What does Glastender error code AtHi mean?
The manual lists AtHi in the digital controller table without a written definition, placing it among the temperature-related alarms. From its name and position we can say the controller is reporting something about temperature, but the manual does not spell out the exact trigger or the limit, so we will not guess at numbers. What it does state are the two causes and two actions. The causes are a dirty condenser coil and a refrigeration system that needs service. The actions are to clean the condenser coil and to call for service. The reasoning behind this is straightforward refrigeration: when the condenser cannot shed heat, the system runs hotter and cools less well, so the cabinet temperature drifts up. A coil clogged with dust, grease or lint is the most common reason in a bar or kitchen setting, and it is the one thing an operator can safely address.
Affected models and control systems
Glastender bar refrigerators with a digital controller, Operation Manual OM007: models C1SB, C2SB, C1SL, C1SU, F1SB and F1SL.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- AtHi appears on the controller
- Cabinet temperature higher than the set point
- Compressor running for long periods
- Warm air from the condenser area or very little airflow
Possible causes
Listed in Glastender's documentation
- Dirty condenser coil
- Refrigeration system needs service
Other likely causes — what usually sits behind error code AtHi on this control. A technician confirms which one it is before any part is replaced.
- Grease and lint blocking airflow through the condenser fins
- The unit pushed against a wall or crowded by other equipment, limiting air intake
- Door left open or gasket not sealing, loading the system with warm air
- Condenser fan slowed or stopped
Safe checks before calling for service
- Check that nothing blocks the air openings around the condenser and that the unit has room to breathe.
- Clean the condenser coil as the manual directs, with the unit unplugged, using a soft brush and vacuum.
- Make sure the doors close fully and the gaskets seal.
- Plug the unit back in and see whether AtHi clears as the box recovers. If it comes back, call for service.
- Note how long since the coil was last cleaned and whether the room is hot.
How a technician diagnoses error code AtHi
- Read the controller code and temperature, and confirm AtHi along with the actual cabinet temperature.
- Inspect the condenser coil and fan and check airflow through the coil.
- Measure supply voltage and check the compressor and fan run correctly.
- Check refrigerant system pressures and temperatures against the unit's specifications.
- Repair the cause found, then watch the box pull down and the code clear.
- Checking refrigerant pressures needs gauges and refrigerant handling skills that require training and certification.
- The compressor and condenser fan circuits carry live line voltage behind panels.
How error code AtHi differs from similar codes
AtHi sits with AtLo, AC 1 and AC 2 in the manual's group of temperature-related codes. AtHi, AC 1 and AC 2 share the dirty condenser coil cause.
Technical reference
- Document
- Operation Manual OM007: Self-Contained, Side Serviced Coolers and Frosters
- Maker documentation
- Glastender owner support
- Edition
- Rev. 06-01-25 OM007
- Models / control
- C1SB, C2SB, C1SL, C1SU, F1SB, F1SL with digital controller
- Section
- Digital Controller Operation, p. 2, Digital Controller Trouble Shooting Error Codes
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Glastender bar refrigeration error codes
Can I keep using the bar refrigerator when AtHi shows?
Cabinet temperature may be rising, so check it with a thermometer and protect perishable items.
Will AtHi clear after I clean the coil?
It may once the cabinet cools back down. If it returns, the manual says to call for service.
Does AtHi mean a bad compressor?
The manual lists only a dirty condenser coil and a system that needs service. A technician has to test to learn which part is the cause.
Need help with Glastender error code AtHi?
A technician confirms the cause on site and gives you the price in writing before any work starts.