My tumble drier seems to work fine but it is only blowing out cold air even when it is set on a hot setting

You have a problem wit the air temperature control blend or the blend door actuator motor, most times both are defective. The parts are located deep in the dash and as such the dash assembly must be removed to service the parts.

Hi. I have a Hotpoint tumble condensing drier which had the same problem. The solution for me was to access the heating element at the back which involved taking the back off and locating the small metal thermostat which is the size of a two pence coin and 10mm thick.There
is a small hole in the centre and all I had to do was press a fairly thick needle into the hole until there was a click which reset the
thermostat and everything was working fine. This problem does still occur now and again. By the way the heating element is attached
to the removed back with cables giving a clue which helped me find
the unit. Hope this helps Regards Peter

you have a leak in the vaccum line,or the heater control switch is suck.

Seems like the blend door is intermittent,Like you said in some cases it works fine,Either the blend door is intermitent or the cycling switch is intermittent this is located on the filter drier when this pressure switch fails the A/C goes intermittent

It's either the fuse, heating element, thermal cut-off or thermostat

Most likely heating element or thermal cut-off is bad, or both.

Sounds like your freon has leaked out and your heater blower resistor is burned out. Deffinitly take this to the dealer.

That sounds to me like your vent "tubing" is disconnected somewhere along the line. I am not sure exactly how it is set up in the vehicle you are driving, but I am certain fixing it will involve taking apart most all of your interior then putting it back together after a 10 minute fix.

vpflueger,
Hi,
I am not sure why.
But I will tell you that at only 5 years old you should repair it.
This is a fine machine!
Try our premium service and they will fix you up!

Check if the drier is blowing out air from the air duct. If not, the fan pulley is likely broken. With no way to cool the machine the thermostat will be shutting the machine off as it overheats.