like the title says doesn't get hot at all. theres no leak in the system and I've flushed it multiple times. even when i was doing my swap while my engine was out i hooked a hose up to it and washed it out with hi pressure both ways so i know its not clogged it had great flow! what could it be? car is a 94 Civic CX hatch back

 

Is the heater valve working correctly? Is the cable properly adjusted? The heater valve is inline with the heater core inlet hose in the engine bay.

If those are OK, it'll be the heater control motor on the side of the A/C assembly in the dash or the control panel itself.

 

heater valve is broken so i fixed it so that it only stays open to allow coolant to flow. and how do i check that heater motor? also shoots out air fine an powerful just not hot.

 

There is no heater motor, there is only one blower motor. Double check your handy work or replace the broken valve.