What would cause the heater in my 1994 Chevy Astro van to quit warming up properly?

Question

During the summer, AC works great. When it is to too cold outside the heater seems to work better. I've had a new water pump and have it serviced regularly.

Answer 1

make sure that your cooling system is full of coolant a low coolant level can cause the heater to not function correctly. Also an air pocket can cause the smae problems and a tstat that is partilly stuck open will do the same

Answer 2

The heater is nothing more than a small radiator inside the car that gets hot water from the radiator. Does the temperature gage go up to operating temperatures? If not, perhaps your thermostat is missing of stuck open, replace it. After driving for a bit, open the hood and find the two smaller hoses that go from the water pump and radiator to the fire wall where they connect to your heater core. Carefully (they may be hot) feel both hoses. They should both be hot if water is circulating. If either is cold, that could be the problem, one of them is blocked. If they aren't blocked, but one is cold, then look at the control valve to see if it actually opens and lets water flow. It will probably be cable controlled, make sure the cable actually opens the valve If none of the above help, take it in and have it looked at.

Answer 3

i'm unsure it style of relies upon on your region. Mechanics value distinctive in many places. If I had to wager i might determine approximately $40 according to hour exertions for 2 hours of restore time plus the fee of the factors.

Answer 4

check your heater valve also check to see if water is leaking inside your van if it is then its your heater core both are easy fixes and inexpensive.

Answer 5

Maybe the vent system is partially blocked somewhere? Does the fan work at full power?

Answer 6

heater core plugged or doors not operating properly plugged core is more likely though