My heat has stopped working and the dash service lights ay check coolant. I just put coolant in 2 months ago? Could i need more and Must it be Dex?

55

Asked by Feb 07, 2014 at 11:38 AM about the 2002 Cadillac DeVille DHS

Question type: Maintenance & Repair

It has been extremely cold and my heat has suddenly stopped working. The dasl lights say check coolant but I just filled the reservoir 2 months ago. Could it still be out? I havent seens signs of a leak...Also it gets socold i get frost indide my windows...

7 Answers

9,875

You need to check the actual level in the rad. The engine can only pull fluid from the reservoir if your system is already full. If you have to much air in the rad/engine it will not work. Once your coolant level falls to or below the pump you will loose the ability to pump the coolant.No pump no coolant to the heater core, no heat. If your system is this low it will take a few shots to fill it up. You may need to find a way to bleed air out of the top of the engine. Coolant needs to touch the thermostat to open it and allow circulation, once the thermostat opens most of the air will be purged out. (An airlocked motor will eventually heat up the internal air enought to open the thermostat but the engine may get hot enough to cause damage. I've cooked one. Use caution)

5 out of 5 people think this is helpful.
9,875

You probably do have a small leak but fill the system first then try and find it.

1 out of 1 people think this is helpful.
55

Thk You. I'll try to check the level. This is a just purchased preowned Cadillac...Do I need to use a particular kind if coolant? I heard I should only use DEX but the 1st time I put coolant in I put regular all purpose Prestone (supposedly for all makes)?

2 out of 2 people think this is helpful.
9,875

All purpose should be fine. Most "all purpose" and "universal" antifreeze is compatible with the new motors. The only thing you should avoid is mixing grades. You already have both so add what ever. The main thing is concentration and if diluting use de-mineralized water or get pre-mixed antifreeze. I run 70/30 antifreeze to water which is liquid down to -45.

1 out of 1 people think this is helpful.
185

there is an arrow on your overflow tank cap make sure it is lined up with the hose coming out of it, that not lined up could in some cases cause that notification to come on for other reasons refer to the answers above me they are correct

185

oh you should use dexcool it's a good product for Cadillac to use

20

I have same problem I got it fixed. Cadillac between 1990 to 1995 they add hose for no reason. U can see three med hose on back engine u can see T hose. One left from heat core and one right from top engine. And one bottom from engine. I shut the bottom hose. And finally got hot heater in car I use nose visa grip to shut bottom hose

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

DeVille

Looking for a Used DeVille in your area?

CarGurus has 1,623 nationwide DeVille listings starting at $2,800.

ZIP:

Search Cadillac DeVille Questions

Cadillac DeVille Experts

#1 kikero
kikero
Reputation 2,100
#2 Js08016
Js08016
Reputation 1,740
#3 Cynthiasmith
Cynthiasmith
Reputation 1,530
View All

Related Models For Sale

Used Cadillac CTS
168 Great Deals out of 11,222 listings starting at $1,300
Used Cadillac Eldorado
341 listings starting at $2,900
Used Lincoln Town Car
28 Great Deals out of 1,840 listings starting at $600
Used Chevrolet Impala
523 Great Deals out of 29,877 listings starting at $799
Used Cadillac Escalade
227 Great Deals out of 11,031 listings starting at $3,000
Used Chevrolet Camaro
148 Great Deals out of 32,614 listings starting at $1,729
Used BMW 7 Series
184 Great Deals out of 6,076 listings starting at $2,999
Used Chevrolet Corvette
99 Great Deals out of 20,456 listings starting at $3,495
Used Ford Mustang
388 Great Deals out of 47,511 listings starting at $1,800

Used Cars For Sale

2005 Cadillac DeVille DHS For Sale
12 listings starting at $2,995
2004 Cadillac DeVille DHS For Sale
26 listings starting at $2,999
2003 Cadillac DeVille DHS For Sale
25 listings starting at $2,800