Heat not working unless engine at higher rpms.

Asked by Dec 15, 2006 at 09:42 AM about the 1992 Chevrolet Lumina 4 Dr Euro Sedan

Question type: Maintenance & Repair

My car started this morning with the low coolant light on. When I went to add more coolant, I pressure cap was loose.  I tightened it and light went off. I added about a quart of coolant. My heater is blowing cool air until I accelerate from a stop or am doing about 50 mph. Then I blow nice and hot like I am use too. Is this a thermostat problem? What else could it be?

1 Answer

18,465

This is a problem which unfortunately has shown up in a few of the 1992 Luminas. A common cause is a gummed-up thermostat. When this happens, the heat comes directly off the heads and flows down into the heater core, which then blows the heat into the cabin, which might explain your acceleration-only heating. One way to check and see if it's stuck opened is to let the car idle for about five minutes. Squeeze the upper radiator hose. If the thermostat is indeed open, you will feel water in the hose. If not, the problem is something other than your thermostat.

Your Answer

Chevrolet Lumina Experts

  • #1
    90V6RedHotLuminaEuro
    Reputation
    1,180
  • #2
    John Saffrahn
    Reputation
    1,090
  • #3
    11jonny11
    Reputation
    930
View All

Related Models For Sale

Used Chevrolet Camaro
413 Great Deals out of 30,520 listings starting at $2,495
Used Ford Taurus
188 Great Deals out of 15,917 listings starting at $1,850
Used Toyota Camry
990 Great Deals out of 79,812 listings starting at $1,200
Used Chevrolet Caprice
191 listings starting at $9,995
Used Honda Accord
1,070 Great Deals out of 56,670 listings starting at $899
Used Jeep Grand Cherokee
828 Great Deals out of 70,386 listings starting at $700
Used Ford Mustang
609 Great Deals out of 36,206 listings starting at $1,800
Used Chevrolet Astro
234 listings starting at $895
Used Buick LeSabre
19 Great Deals out of 1,778 listings starting at $750

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.