after a clutch fan was changed I now have no heat while it idles. on 2002 Suzuki XL-7

unless I apply the gas I will not get heat. is this from the clutch fan being replaced?

Asked by for the 2002 Suzuki XL-7
Thermostat, most likely, worn water pump impeller, possible.
Temp gauge reading at extended idle is??
1 more answer
may also have an air lock in the heater core. find someone that can evac cooling system to get all the air out.