Anets Fryer Error Code HEAT FAIL: Ignition Lockout
HEAT then FAIL alternating on an Anets AGP fryer with the digital controller means the ignition system has locked out. The manual says to contact a service company.
High: the burner has locked out and the fryer will not heat until the ignition system is serviced.
What does Anets error code HEAT / FAIL mean?
On a gas fryer the controller asks for heat, the ignition system lights the burner, and a sensing circuit confirms a flame. If flame is not proven within the time the system allows, the ignition control stops trying and locks out, so gas is not released into the burner over and over. The digital controller reports this by alternating HEAT and FAIL on the display. The manual gives the meaning as ignition system has locked out and the action as contact a service company. It lists no causes and gives no reset instruction for the operator. Because a lockout is a protective stop, switching the fryer on and off repeatedly to force it is not recommended. The document does not say which part of the ignition chain failed, only that the system has stopped trying.
Affected models and control systems
Anets AGP series gas fryers (AGP55, AGP55T, AGP60, AGP60W and AGP75) with the digital controller, which alternates HEAT and FAIL. The computer control shows the lockout as HEAT FAILURE on two lines.
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
- HEAT and FAIL alternate on the display
- The burner does not light, or lights briefly and shuts off
- The oil stays cold or stops heating partway to temperature
Possible causes
Likely causes — what usually sits behind error code HEAT / FAIL on this control. A technician confirms which one it is before any part is replaced.
- Gas supply to the fryer turned off or interrupted
- Pilot or spark ignition weak, dirty or out of position, so flame is never proven
- Flame sensing part coated with soot or grease and unable to report flame
Safe checks before calling for service
- Check that the gas shutoff valve at the fryer is open and other gas appliances on the line are working.
- Make sure the drain valve is fully closed and the oil is at the marked line.
- Switch the fryer off, wait a minute or two, and try one normal restart. Do not keep retrying. If you smell gas, leave the area and call the gas company.
- If HEAT FAIL returns, leave the fryer off and note whether the burner lit at all and how long before FAIL showed.
How a technician diagnoses error code HEAT / FAIL
- Confirm gas supply and pressure, then watch a full ignition attempt and note where it gives up.
- Inspect the pilot or igniter, flame sensing part and burner ports for soot, grease or misalignment.
- Check the ignition module output and the gas valve coil with a meter during a trial for ignition.
- Check the high-limit and other safety switches in the valve circuit for an open contact.
- Replace the igniter, sensor, valve or module only after the failing step is found, then verify a stable flame.
- Ignition and gas valve diagnosis involves live gas and ignition voltage that must be tested with the burner running.
- A lockout is a safety stop, and bypassing it is dangerous, so only a licensed technician should reset the control after the cause is found.
How error code HEAT / FAIL differs from similar codes
HEAT and FAIL alternate on the digital controller, while the computer control shows HEAT FAILURE on two lines. Both mean the ignition system has locked out.
Technical reference
- Document
- Anets AGP Series Installation & Operation Manual
- Edition
- 150-000007 Rev C (9/19)
- Models / control
- Anets AGP series gas fryers (AGP55, AGP55T, AGP60, AGP60W, AGP75) - digital controller
- Section
- 6.6 Digital Controller Display, p.30
- 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 Anets fryer error codes
Can I reset it by turning the fryer off and on?
The manual gives no operator reset. One calm restart after checking the gas valve is reasonable, but repeated tries are not advised.
Is the burner broken if HEAT FAIL shows?
Not necessarily. The manual only says ignition has locked out, which can come from supply, sensing or the ignition parts.
What should I tell the technician?
Whether the pilot or burner lit, how long it ran and whether the gas supply was on.
Need help with Anets error code HEAT / FAIL?
A technician confirms the cause on site and gives you the price in writing before any work starts.