Bosch Refrigerant Compatibility Guide
Find the correct refrigerant, recharge specs, and troubleshooting help for Bosch residential heat pumps and mini-split systems.
- OEM‑Accurate Refrigerant Match
- Model Lookup by Prefix
- Error Code Reference
- Fast Nationwide Shipping
Compatible Refrigerants
R‑410A
Used across most Bosch ducted heat pump systems.
R-32
Bosch's ductless mini-split and newer heat pump lines use this single-component A2L refrigerant.
R-22
Not applicable to most Bosch equipment, which entered the US residential market after the R-22 phase-out began.
Model Lookup table
| Model Prefix | Series | Refrigerant | Typical Capacity |
|---|---|---|---|
| IDS2 | Inverter Ducted Split | R-410A | 2–5 Ton |
| CL5000 | Ductless Mini-Split | R-32 | 0.75–3 Ton |
| BOVA | Compact Heat Pump | R-410A | 2–4 Ton |
Error Code table:
| Code | Meaning | Refrigerant‑Related? |
|---|---|---|
| E4 | Low pressure protection triggered | Yes check charge & leaks |
| E5 | High pressure protection triggered | Yes check overcharge/airflow |
| E8 | Compressor overload | Possibly confirm charge before replacing part |
R-410A vs. R-32 Across the Bosch Lineup
Bosch splits its US residential lineup between two different refrigerants depending on product line, not equipment age.
Why Bosch's Ductless Line Uses R-32
Since Bosch's ductless products entered the US market more recently than its ducted lineup, the company built that product line around R-32 from the start rather than transitioning it later from R-410A. That makes refrigerant type largely predictable by product category on Bosch equipment.
Confirming Charge Type Before Service
Because Bosch doesn't use age as the dividing line between refrigerants, checking the model prefix or dataplate is the only reliable way to confirm charge type assuming ducted equals R-410A and ductless equals R-32 is usually correct but should still be verified against the specific unit.
Handling Requirements for R-32 Service Calls
R-32 is a mildly flammable A2L refrigerant, so technicians servicing Bosch's ductless CL5000 line need A2L-rated recovery machines and storage, the same requirement that applies across any R-32 or R-454B system regardless of brand.
Frequently Asked Questions
- Ducted systems like the IDS2 series typically use R-410A, while the ductless CL5000 mini-split line uses R-32 confirm against the dataplate for your specific model.
- R-32 is a mildly flammable A2L refrigerant and requires A2L-rated recovery and storage equipment, unlike non-flammable R-410A.
- No Bosch entered the US residential market after the R-22 phase-out began, so current equipment runs R-410A or R-32.
E4 indicates the low pressure protection has triggered, usually from an undercharge or refrigerant leak.
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