Ford Fiesta Flight - 2001 Ford Fiesta heater not working - Mark Gilbert

I have a ford Fiesta Flight on a 51 plate. The heater is only blowing cold air. I have checked the coolant level and this is on Max and also flushed out the heater matrix. As the pipes were cold after the heater control value and hot before it, I replaced the heater control valve. but the heater is still blowing cold air, and the pipes are the same cold on one side hot on the other. Has anyone come across this before. I don't want to replace the heater control panel unless I need to, is there a way of checking this is faulty before replacing this (I have a multi meter), or could it be something else?

Thanks in advance

Ford Fiesta Flight - 2001 Ford Fiesta heater not working - elekie&a/c doctor

Disconnect the 2 pin electrical plug to the heater valve.This should put the valve into fully open mode with max heat.If there is still no heat,then I would suspect a blockage,possibly the matrix.If no a/con fitted,the matrix is very easy to remove for testing.

Ford Fiesta Flight - 2001 Ford Fiesta heater not working - Mark Gilbert
Thank you, I will try disconnecting the plug on the valve when my wife comes back from work, and let you know the result. There is no air con fitted and I did connect the garden hose to the heater matrix to see if the water flows through before replacing the value and it does, although the water does not come out as fast as it goes in. I'll see if disconnecting the value allows the water to flow through.
Ford Fiesta Flight - 2001 Ford Fiesta heater not working - Mark Gilbert
I've disconnected the 2 pin plug and the pipe going into the matrix is warm for the first 2 inches then goes cold. I've tried squeezing the pipe to see if this can remove the blockage, but that doesn't seem to work. I'll have a go at removing the matrix and see if this is the issue.
Ford Fiesta Flight - 2001 Ford Fiesta heater not working - khcomp

Sounds like the matrix is blocked or there's an air lock in the system: Have you flushed the heater matrix through in both directions and for a good few minutes?

 

Ask Honest John

Value my car