350VortecSSCT
Full Access Member
Alright I have no problem with the temperature, but on high it is barely blowing any hott air out...any ideas?
Barely any heat!
- Thread starter 350VortecSSCT
- Start date
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what degree thermostat do you have in? I had the same problem when running a 160, if that is the case put a 190 in
blueflamed03
Supporting Member
agree with bowtie...may be too low, or HC possibly going out.
DJTricky
Banned
or low on coolant.... i have a 130 high flow thermostat and have no heat... but in the winter(almost here) im gonna put in a 160 high flow
ravingmadman
Chief Knuckle Buster
Or your thermostat might be going completely. Most of the thermostats now days fail open, and just let coolant through them, rather than failing closed, and superheating the engine block. Either way, go for the thermostat first- it's way easier than the heater core. 
3-lot
Full Access Member
check both heater hoses going into the core, if ones a lot colder then the other, you may get away with back flushing heater core (take off one hose and run water from a garden hose through it till it doesnt feel like theres any restriction left)
its a temporary solution to replacing the heater core, but it may work for a while.
and like everyone else said, make sure the thermostat is right for the truck and in working order.
its a temporary solution to replacing the heater core, but it may work for a while.
and like everyone else said, make sure the thermostat is right for the truck and in working order.
Make sure the vacuum controlled valve, for turning the coolant on and off, is operating properly. Have someone turn the heat control up and down, while watching the control valve. The truck needs to be running to supply the vacuum. 
It should be easy to find the valve. Passenger side along side the inside fender. Three hoses going in and out of it, plus the small vacuum hose.
It should be easy to find the valve. Passenger side along side the inside fender. Three hoses going in and out of it, plus the small vacuum hose.
Cdnguy
Full Access Member
i removed mine plus a new t-stat and does it crank the heat now.Make sure the vacuum controlled valve, for turning the coolant on and off, is operating properly. Have someone turn the heat control up and down, while watching the control valve. The truck needs to be running to supply the vacuum.
It should be easy to find the valve. Passenger side along side the inside fender. Three hoses going in and out of it, plus the small vacuum hose.
AtomicHoe094
Atomichoe094
how did you remove it? and why?
Cdnguy
Full Access Member
i just disconnected it and put the lines straight into the heater core. i removed it cause it wasn't working.
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