843767 Thermo Monitor | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta thermo monitor for the alarm function, from the Instruments group, weighing 0.088 kg and listed for 25 applications across the D, TD, TMD, TAMD and TAD series.

🚤 Compatibility

• Engine Family: D, TD, TMD, TAMD, TAD

Full model list at the end of this description.

⚙️ Key Features

• Alarm function
• 0.088 kg
• 25 applications across D, TD, TMD, TAMD and TAD
• Instruments group

🔌 Function

Closes at a set coolant temperature to raise the overheat alarm.

⚠️ Common Signs of Failure

• Overheat alarm sounding with a normal gauge reading
• No alarm at all when the circuit is tested
• Alarm cutting in and out as the engine warms
• Weeping coolant from the body or its thread
• Corroded terminal or chafed lead at the switch

🛠️ Service Notes

• The three monitors here do different jobs: this one is the alarm, 843769 is the stop function, and 843768 carries no function marking — order by number, not by appearance
• Only 4 grams separate this from the stop monitor 843769, so weight will not tell them apart
• This is part of the engine protection circuit, so prove it after fitting rather than assuming it works

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TD100AHC, TD100ARC, TD100CHC, TD100CRC
• Volvo Penta TD120AHC, TD120ARC, TD120BHC, TD120BRC
• Volvo Penta TAD120AHC, TAD120BHC, TAD120CHC
• Volvo Penta D100BHC, D100BRC
• Volvo Penta D70CHC, D70CRC
• Volvo Penta TAMD122A, TAMD122A/C
• Volvo Penta TD121CHC, TD121CRC
• Volvo Penta TD70CHC, TD70CRC
• Volvo Penta TAD121CHC
• Volvo Penta TAMD102A
• Volvo Penta TMD102A
• Volvo Penta TMD122A