Heat pumps · Error codes · Danfoss
16Danfoss · DHP-AT
16 on a Danfoss DHP-AT: Exhaust gas temperature overheat protection
Short answer
On a Danfoss heat pump, 16 means: Exhaust gas temperature overheat protection. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Exhaust gas temperature overheat protection.
Part involved: Exhaust gas temperature overheat protection.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
What you can check
- Note the 2-digit code. Check the outdoor unit is not blocked by snow, ice, leaves or debris and that airflow around it is clear. If the code persists, call an engineer.
What the engineer will check
- Discharge pipe sensor stops compressor at too-high hot gas temperature; stop ceases when temperature normal (p.17).
Who to ask for: heat pump engineer.
Certification: F-Gas category I certificate (refrigerant circuit work).
What you might notice
Sources
- Installation Guide DHP-AT - Installation and service manual (VMGFI302 / AN089486453198) ↗ · VMGFI302 · page p.32 (section 10.1.1); safety functions pp.16-17 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026