Remove hoses. Inject water into heater water output connection but be carefull not to use full pressure of house supply.
heater core hoses not hot
Try flushing the coolant system out
what is the year model? 1995
Remove the hoses going to the heater core. Use a regular water hose with a high pressure nozzle and flush both ways.
Either pull the hoses off of the heater core and flush the core out or pull the hoses off the block and flush the heater core through the hoses..............
I wouldn't think you could flush a heater core. you can flush a radiator. Heater core you would have to replace if it is leaking or stopped up
To change the heater core in a 87 ford f150 is easy. Just remove the glove box and then behind it there is 7 bolts. After you remove the 7 bolts then just remove the cover and behind it is the heater core. By far the easiest heater core I ever changed.
you should be able to get at heater core just by removing glove box.no need to remove all the dash Is there any instructions on how to do this?
Your heater core might be clogged or otherwise inoperable. Videos for unclogging a heater core can be found quite easily on Youtube.
You probably have a leaking heater core.
You can flush the block thru the line to the heater core at the firewall. This will flush the heater core also.
There are several common heater problems for a 1997 f150. A stopped up or leaking heater core, bad thermostat or clogged up blower fan housing all can cause heat problems.