Heater Motor relay - my experience

[Russian Rocket]

This is the heater motor control relay. A lot of people seem to have a problem with it.

It is situated in the passengers foot well behind the top panel.

You can see on mine that the middle left pin of the 6 pin connection has been overheating. This has been caused by a poor connection.

There is (was) insufficient clearance on the top plate of the relay for the connector to seat properly. The top plate is easy to remove (4 screws) an then I filed the appropriate amount of the edge (left hand side in picture). Cleaned up the connections first with fine grade paper, then a spray switch cleaner and re-assembled the whole thing

Works again no problems.

I would only recommend touching anything electrical on the TVR with the battery disconnected and make sure you are earthed to the car. TVR electric’s are notoriously easy to blow.

[Whitey]

What are the symptoms of this fault?

Thanks for the info!!

[Russian Rocket]

problem was it wasn't working

[Whitey]

you mean simply no heat? Could you hear the servo motors changing the flaps and fans working ok?

[BGB autosport]

I cant actually find this. I have check the footwell and there seems to be no panel. Am i just being blind? Sounds like this might be my issue as i can hear the flapper moving i just have no fan. Where is the actual fan located? Is it under one od the dooms in the engine bay?

[BGB autosport]

Found it, tucked right up out of the way and velcro'd to the body. Mine is a Mk1 and i presume the above is a Mk2? as they look very different. All sorted now, just have to clean the contacts in the car side plug. The solder had run out where the connector joins the board and there was a couple of other dry joints too, which i resoldered.