Heat not working unless engine at higher rpms.


Asked by christianculp 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


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

Add photo

Related Questions

Search Chevrolet Lumina Questions

Chevrolet Lumina Experts

#1 90V6RedHotLuminaEuro
Reputation 900
#1 John Saffrahn
John Saffrahn
Reputation 900
#3 Justin Hatfield
Justin Hatfield
Reputation 820
View All

Related Models For Sale

Used Ford Escort"
561 listings
Used Buick Regal"
180 Great Deals out of 8,656 listings starting at $999
Used Chevrolet Blazer"
10 Great Deals out of 1,575 listings starting at $1,999
Used Chevrolet Caprice"
157 listings starting at $10,470
Used Chevrolet S-10"
36 Great Deals out of 1,644 listings starting at $399
Used Toyota Camry"
1,244 Great Deals out of 78,101 listings starting at $1,450
Used Pontiac Grand Prix"
75 Great Deals out of 4,248 listings starting at $800
Used Honda Accord"
1,050 Great Deals out of 71,286 listings starting at $1,491
Used Ford Taurus"
432 Great Deals out of 21,425 listings starting at $1,200