Stafford yesterday, must be the Classic Bike Show. I missed it this year.
Question for you, did the engine temperature gauge show normal warm on the journey up.
Just thinking as I had a similar problem on my Zetec engine car in the early days and that was because the engine coolant was not getting up to temperature because the thermostat was stuck open giving a constant cooling effect from the radiator rather than being controlled by the thermostat. More noticeable on cold days.
I sorted the thermostat and the heater started to work as well.
The problem is that the later Zetecs and maybe your Sigma engine don't actually measure water temperature but have a sensor in the engine block or head so it could show a warm engine even if the coolant was still not up to temperature
The reason it was hot when you were queuing could be that, as the radiator had no air flow, the coolant and hence the heater would get hot.
Just a thought.
Last edited by IvorMog; 20/10/19 07:01 PM.
