having heater trouble in my little fiesta.
theres no misfire or sludge in the coolant tank/oil filler cap and the temp gauge never gets past 1/4 of the temp scale so that rules out HGF.

apparently the fords are known for this...what could be the problem?

thanks in advance
me

 

Replace the thermostsat for a start

 

change the thermostat backflush the heater matrix

 

Before you change stat and anti freeze, I would run around for a few hundred miles with WYNN's cooling system cleaner, it gets out every last bit of crap out of there, and will leave it in the bottom of the expansion tank in a opaque gel like substance, but god it works so well.
Then new stat/a,freeze and if still reading low a temp sender, mine always shows low about 1/4 even with new stat etc, though if it sits in traffic and goes up to about 3/4 it will generally stay there for the rest of the day.
tabetha

 

What kind of trouble are you having exactly bud ? If it doesn't blow hot then chances are it's the "heater control valve" under the wipers that's knackered (if your car has one ?). £20, an hour to replace, google it.

 

im having similair problems...apart from my temp gauge goes up stright after starting the car frm cold..the heaters blow warm straight away and the water in the header tank is cold...ive put new anti freeze in and a 82 degree thermostat..gonna change the temp sensor also..any ideas? everything was working fine before i took it off the road.can temp sensors knack up after sitting for 18month? cheers

 

that is exactly what the problem was,the solenoid on the heater valve was knackered.
i connected the new part up and it worked perfectly with a good click then tried the old unit and it was silent.

got a nice warm toasty fiesta now