Do not order by colour alone
Block Heater Cord & Connector Identifier
Start with what is actually damaged and where the cord disconnects. This short path separates a replaceable wall plug from a heater cordset or compact vehicle-inlet system.
No cord number? What needs replacing?
Photo guide: which part are you looking at?
Start by separating the wall connection, the heater-side lead and the heater element. These photographs show two examples; they are not a connector compatibility chart.
Wall-side plug and outlet
Look for two flat blades and the grounding pin. These identify the wall-side connection, not the connector at the engine. The same wall plug can be used with different heater systems.
Check a damaged wall plug →Heater element: a different part
The threaded metal body belongs to the heater itself. A missing power lead does not establish that this part needs replacing. Identify the installed heater before choosing its specified cord.
Separate heater, cord and plug problems →A detachable connection at the engine
Record the heater label, cord number, connector face and retaining feature. Similar contacts or housings do not confirm compatibility. Use the replacement number specified for the installed heater.
Find manufacturer cord numbers →Zerostart manufacturer catalogues ↗A small capped inlet in the bumper or grille
Find the system brand and inlet marking before buying a lead. DEFA and Calix have their own systems. Check the exact product and voltage for Canada; a European-market image is not proof of a compatible Canadian part.
Take these photos to the parts counter
Disconnect mains power and let the engine cool first. Photograph only accessible parts; ask an installer to identify anything you cannot reach safely.
- The full lead and where it connects to the vehicle.
- The heater label and every number printed on the old cord.
- The connector face, side profile and clip or locking feature, if accessible without forcing it.
- Any thermostat, warning label or inlet marking. Also record vehicle year, model and engine.
Ask for the manufacturer-specified replacement number. Colour, pin count and a photograph alone are not enough to approve a substitute.
Find Amazon options for your cord number
Already know the replacement cord number? Look it up here. This matches a part number, not your vehicle or connector.
Record these four things
- 1.Vehicle year, make, model and engine
- 2.Heater brand and label number
- 3.Connector shape and number of contacts
- 4.Any number printed along the old cable