| Author | Message | ||
     Darryl Watson New User Username: inox Post Number: 4 Registered: 4-2015 |
Hi, Apologies for long(ish) post but I will try to include all info in one go. 1990 Mulsanne S. Cold air from heater at 50 (80 KPH) (or higher) miles / hour. Warm air when driving around town. Water gauge pointer just below middle of the white. 9 years ago I was experiencing the heating problems and the a heater overall kit was fitted amongst other items in the air con. Heat OK. January last year I fitted a second hand tap body (used existing repair kit) after the one on the car broke dumping coolant all over the road. As far as I can remember the heating worked OK after the replacement. Started noticing a regular tapping from the heater valve (audible inside the car). Not sure if the heater was working OK when the tapping started. On a long run (by UK standards) in May 2015 cold air from heater at higher speeds. I have fitted another repair kit, (a Mercedes W123 HVAC Heater Control Mono Valve Kit 0008350644 with same Bosch part number) but to no avail. I am considering replacing the body again but before I do any ideas please. Many thanks Regards Darryl | ||
| Jeff Cheng New User Username: makeshift Post Number: 4 Registered: 2-2016 |
At first glance (and without any specific vehicle systems knowledge), I'd say check the thermostat isn't sticking open? No heat at high speed would indicate overcooling of the coolant with the additional airflow through the radiator. No such problem around town lets the coolant stay at proper temps. | ||
| Darryl Watson New User Username: inox Post Number: 5 Registered: 4-2015 |
Hi, Thermostat is OK as needle sits in the white on the temp gauge. Since making the post I have replaced the heater tap. The heater now seems to be OK (fingers crossed) |
