Antminer L9 Fan Speed Simulator for Water Cooling & Silencer Blower
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Antminer L9 Fan Speed Simulator | Spoofer for Water Cooling, Silencer & Immersion Conversion
The Antminer L9 fan speed simulator is a small board that spoofs the tachometer signal the miner's controller expects from its stock fans. Without that signal, the controller throws a fan-fault error and shuts down the hashboards within seconds. Install the simulator and the controller sees a "healthy" fan reading, freeing you to run the miner with water cooling, silencer ducting, oil immersion, or any other cooling solution that removes the original fans.
Cross-compatible with Antminer L9, T21, S21, S21 Pro, and S21 XP — same controller logic, same fan-signal expectations, same spoofer board. Plug into the fan header, route the cooling solution, and the miner runs without fan-related error codes.
When You Need a Fan Speed Simulator
- Water cooling conversion — stock fans removed, water block replaces them, but the controller still expects fan tachometer pulses.
- Silencer cabinet installation — sound-dampening enclosure with its own ducted fans, original L9 fans pulled.
- Oil / hydro immersion setup — miner sealed in coolant, fans removed entirely.
- Fan-fault errors stuck after a known-good fan swap — controller refuses to clear the error even with healthy fans.
Antminer L9 Fan Speed Simulator Specifications
| Feature | Specification |
|---|---|
| Compatible Miners | Antminer L9, T21, S21, S21 Pro, S21 XP |
| Function | Fan tachometer signal spoofer |
| Cooling Use Cases | Water cooling, silencer, oil / hydro immersion |
| Installation | Plug into fan header, no firmware change |
| Control Modes | Multiple speed control modes |
| Weight | 10g |
| Condition | Brand New |
FAQ — Antminer L9 Fan Speed Simulator
Q: Does the simulator work on the standard air-cooled L9 too?
A: It's designed for conversions where the original fans are removed. On standard air-cooled L9 with intact fans, the original tachometer signal is already present — you don't need a simulator. Use this when you're cutting out the stock fans for a different cooling path.
Q: Will it work on the S21 Hyd or other hydro models?
A: Hydro models often ship with their own cooling-control logic and don't always need an external spoofer. Confirm with us before ordering if you're working on a hydro variant — fan-header pinout and signalling differs.
Q: Does removing the original fans void warranty?
A: Yes — modifying the cooling path voids the manufacturer warranty on most miner models. The fan simulator is a post-warranty modification tool for operators who own the miner outright and want full control over thermal management.
Q: Bulk pricing for fleet conversions?
A: Yes — email contact@lys-sz.com for volume pricing on L9 / S21 fan simulators when converting an entire fleet to water cooling or immersion.
Related products
- Antminer 4-in-1 Fan Speed Simulator
- Dragonball A11 / KS6pro Dual Fan Simulator
- Whatsminer 4-Pin Fan Simulator (Immersion)
- Universal ASIC Miner Fan Tester
Mining farms converting L9 / S21 fleets to water cooling or immersion? Email contact@lys-sz.com for bulk fan simulator pricing. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
Get dedicated B2B pricing on this part and across our full catalog — quote response within 24 hours, payment by T/T USD bank wire, and DDP delivery available for US & EU customers (and other lanes on request).
