Hello everyone,

I have a 1994 Volvo 940 Turbo with 140K miles. Last winter, the engine struggled to warm up; the temperature gauge barely moved and never reached the middle, resulting in poor heat and an engine that was hardly warm to the touch. I did a coolant flush, replaced the thermostat twice with new coolant, and bled the system, but the issue persisted.

This summer, everything seemed fine—the engine warmed up properly, the temperature gauge reached the middle, and the heater blew hot air. However, with the cooler weather returning, I'm encountering the same problem again. I would really appreciate any help, as winter is approaching.

Thank you in advance!