Problems with 1990 Volvo 240DL

volvo
stall
heating

#1

I have a couple of problems with an old Volvo.

First, the heat won’t shut off. I can turn off the fan, but I can’t turn off the heat, any ideas?

Second, the car stalls with no warning. I’ll be sitting at a light or stop sign and it dies. No sputtering or any other warning, it just dies. Then I have a terrible time getting it started again. I’ve killed the battery trying to get it started. If I let it sit for an extended period of time, it starts with no problem, then it dies within 20 miles or so.


#2

There is a complicated looking mechanical valve that controls the flow of water/coolant into the heater core inside the car. If this valve is stuck open then the air in the car will stay hot. Here is a photo of the valve: http://198.208.187.182/internet/PartImage.jsp?mfgname=ACDELCO&prodlinecd=15&acpartnbr=15-50264 (RockAuto.com Volvo heat & AC section)
Assuming the valve is easy to see, have someone work the temperature control inside the car while you watch the valve to see if it moves.


#3

My '88 240 DL had the same quitting issue after my sister bought it from me. I believe we finally figured out it was a relay issue. We tried replacing the intank fuel pump first because it was making noise but it seems the relay solved the problem.