1998 Cadillac Catera Heater blows out cold air

1998 CADILLAC CATERA
Avatar
BORDENL
  • MEMBER
  • 1 POST
Heater problem
1998 Cadillac Catera 6 cyl Four Wheel Drive Automatic

What would make my heater blow out cold air? We have already replaced the thermostat.
Nov 30, 2009 at 2:23 AM
Advertisement
Avatar
FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
You have a heater control valve that is in the rear of the engine, and somewhat difficult to access. There is a vacuum line going to it. You need to determine if vacuum is getting to that valve. I am not sure if it needs vacuum to let hot water flow to the core, or if no vacuum allows it to flow. It could also have a faulty diaphragm, and therefore be non-functional.
Dec 1, 2009 at 1:57 PM
Avatar
52XMAX
  • MEMBER
  • 6 POSTS
Did you figure out problem. I too have the same problem. I am told that the dash needs to come out and the acuaitor (sp?) maybe bad. I hate this car.
Dec 9, 2009 at 10:28 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle