You have run out of coolant, or the heater matrix is blocked.
It could be a number of issues ..... blocked matrix (behind dash) An airlock in the water system, A leaky head gasket, A seized thermostat
remove Radio ,remove lower dash panel complete with glove box. remove heater box.
The heater matrix can be accessed from the front passenger side. Remove the glove box and the flow end return pipes for the heater matrix can be seen. You will need a fairly long T20. Torx driver.
Bypass the cooling system and discard altogether the heater matrix if you use the car below Rome.
Remove dash,centre console,heater box and you'll find it in there
try replacing the chip that's located in passenger side under glove box and is in the heater vent which goes from the heater blower to the matrix cover hope this helps i changed mine and all was well.
There is no heater control valve fitted on a Ford Escort. The heater matrix is directly connected to the engine's cooling system. To reach the heater matrix, you should remove all the facia unfortunately... :(
Remove centre consul. Drain cooling system. Remove 2 heater pipes on bulk head under bonnet. Remove matrix cover in car under dash. Pull matrix out. This was on a 2002 model. As they say in the haynes manual..do in reverse to refit !
my heater switch on my vauxhall frontera as just stopped working but we can feel slightly heating coming through
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