21476514 Thermo Monitor | Genuine Volvo Penta Part

🔧 Product Description

A temperature monitoring component used in a Volvo Penta instrument, alarm or engine-protection system. It must be selected by exact part number because the switching point and electrical logic are application specific.

⚙️ Key Features

• Genuine Volvo Penta temperature monitor
• Designed for alarm and engine-protection circuits
• Factory-calibrated operating threshold
• Marine or industrial sealed electrical construction
• Exact connector, thread and switching logic must match
• Engine type: Electronically monitored Volvo Penta marine or industrial diesel

🔌 Function

Monitors engine or coolant temperature and provides the signal used by the instrument or protection system.

⚠️ Common Signs of Failure

• Incorrect or missing temperature display
• False over-temperature alarm
• Alarm fails during a functional test
• Engine derate or shutdown with normal temperature
• Open-circuit, short-circuit or communication fault

🛠️ Service Notes

• Check the replacement is the one specified for your engine and for its electrical system voltage before fitting; monitoring units are built for a particular system and are not interchangeable on appearance
• Isolate the batteries before disconnecting it and note the connections so it goes back exactly as it came off
• Make the terminals off clean and tight with a good earth, and protect the connections against damp — a corroded terminal or poor earth gives false readings and false alarms
• Where the unit screws into a housing or waterway, use only the sealing washer or thread treatment the workshop manual for your engine specifies; extra sealant can upset both the seal and the earth path
• After fitting, run the engine up and satisfy yourself the reading or warning behaves sensibly against a known good reference before relying on it at sea

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21476514 → Supersedes 21294573

OEM / Related Numbers

• 21294573 earlier number superseded by this part

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging