Little or No Heat on 2004 Chrysler Town & Country

No heat or little heat is coming from the heater. Don't smell coolant, although we've had to add more as of late. No obvious leaks (puddles under car). I replaced the thermostat over the summer and hoses seemed to be OK. Is it the heater core? How can I tell if it is the heater core?

by in Raymond, NH on January 23, 2011
2 answers 2 comments
ANSWER by , January 24, 2011
Check to see if the hose going into the heater core is hot with a cold hose coming out. This would mean the core is restricted and needs back-flushed or replaced. The thermostat that was installed may be too cold for the vehicle. Verify the proper temperature rated thermostat was installed.
COMMENT by , January 24, 2011
I'll check the inlet and outlet hoses. Could a restriction in the core cause the engine temp to rise? I'll be sure to check back in. Many thanks for the advice. AJ
COMMENT by , January 24, 2011
A restriction in the core could allow the temperature to rise somewhat, but not to the point of overheating usually.
ANSWER by , January 24, 2011
Once the proper operation of the basic systems have been confirmed as the previous reply stated. There may be a heater control valve problem or possiblly an issue with the temperature control in the HVAC system.