My Temperature gauge reads normal but I have no heat, what can I do to fix this?

U gotta pop hood and go to pass side and feel if those heater hoses r hot with car running ,if 1 hot ,1 cold , the heater cores plugged up, When it sits and idle the gauge doesn't creep up to hot?? Also what's the milage on car?? Diaper get expensive , wait till u gotta buy the girls coach and gucci pocketbooks..

both hoses are cold temperature gauge reads normal mileage is a little bit less than 130k

coolant levels are at normal