I need a Remote Control for a Red Core Model 15401 heater. Where can I buy one.

SOURCE: removal and instalation of new heater core

most all your major auto parts stores have web sights, you can get detailed instructions for disassembly and assembly with drawings.

SOURCE: 91 S-10 4WD HEATER BLOWS COLD, HEATER CORE IS NOT

1st check your radiator coolant levels this wold contribute as a loss of heat
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2ndthe cable may have slipped and is disallowing the heat exchange from cold to hot this is under the dash and most accessible from the passengers side ...simply locate it with a light source and work the lever /switch to see if it is moving all at once the n allowing the door to open
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3rd there should be on top of the heater under the hood passengers side where the fan resides a 3 wire plug that plugs into the heater coils remove it to see if the coils are still in tact they do burnout like a fuse ..2 screws hold it in place .

also check your fuses

also note the water pump may have malfunctioned does your temperature Gage read normal if so this would rule out the exchanging of fluid into the block from the radiator

otherwise if it does over-heat either the radiator is at a loss for fluid and should be topped off and checked for leaks..
or the thermostat is stuck and will need replacing

to check the thermostat while engine is cold remove the radiator cap then start the vehicle and watch for the fluid to circulate within the filler neck area this may take a few minutes if so then it

to check the heater core to see if it is plugged you will need to remove both hoses and with a garden hose insert the hose into either one as you watch for the water to come out of the other hose {{DO NOT USE FULL FORCE OR YOU MAY RUPTURE IT }} if it does not then you need to flush it until it comes out clearly you may see a lot of gunk this is sediment and back flushing it will work it as well they sell a product to help loosen all the material {hard-water etc } which will allow most if not all of it to free up and again wita garden hose insert it and flush the remains out of it