Heat is not working I put a new water pump on and a new thermostat? on 1999 Ford F-250 Super Duty

I seem to be losing coolant slowly but I can't tell where, but heat still doesn't work after I refill coolant. Another symptom is normal temperature while running but gets hot when at a idle. Any suggestions would be appreciated.

by in Dandridge, TN on December 20, 2013
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , December 20, 2013
POSS LOW COOLANT LEVEL