Heat not working unless engine at higher rpms.

christianculp
0

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

carGrrl
13,775

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 John Saffrahn
John Saffrahn
Reputation 890
#2 90V6RedHotLuminaEuro
90V6RedHotLuminaEuro
Reputation 880
#3 Justin Hatfield
Justin Hatfield
Reputation 790
View All

Related Models For Sale

Used Chevrolet S-10"
38 Great Deals out of 1,598 listings starting at $899
Used Chevrolet Caprice"
154 listings starting at $2,495
Used Buick Century"
1,351 listings starting at $1,550
Used Toyota Camry"
1,219 Great Deals out of 76,057 listings starting at $800
Used Honda Accord"
1,031 Great Deals out of 71,484 listings starting at $1,200
Used Buick Park Avenue"
11 Great Deals out of 581 listings starting at $2,401
Used Jeep Grand Cherokee"
817 Great Deals out of 60,206 listings starting at $1,000