× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: Low heat at idle/ water pump testing, heater core testing
Posted to Technical Discussion Forum on 11/26/2022 1 Reply

The only change for idle to high rpm is at high rpm you lose vacuum, whatever is vacuum controlled in the heater circuit is the problem. Login to read more.

1 Replies Received (View Replies)