2004 Buick Century Q&A
2004 Buick Century Question: Heater problems
On my 2004 Buick Century the heater fan always works fine, but I only get cold air from vents. How do I fix this problem? - Visitor
when the engine is warmed up touch the heater core hoses going into the firewall,if one feels much cooler then the other then you'll need to backflush the heatercore.a simple garden hose hooked to the smaller line coming off the firewall is all you will need.run the water for only a few seconds letting the excess drain on the ground(unless your a green person)rehook the hoses and check for heat.any air trapped in the system will get purged back to the overflow tank so you'll be ok in that aspect.check the baume with a hydrometer to make sure you have freeze over and boilover protection. - joelburke26
When the heater only works on high, the most common problem is a blower motor resistor. The correct repair is to replace it with a new resistor.
I've asked a number of knowledgeable mechanics and we're all stumped. Figure this one out and you win the cookie. :) Symptoms: At normal driving temperature, the temp gauge fluctuates between "No...
how do i repair the heater core in a 2003 buick century
my heater blower is inoperative at all speeds, no fan at all. The blower works though as the A/c works on the first 2 levels, just not on high speed. I replaced the blower resistor with no luck. No...
What are the steps to replace a heater core?