Bosch exxcel wvd24520gb F17 fault code

Hi

I am hoping there is someone here who can help me so thanks for reading and if you can offer any advice i would be glad to hear from you.

My Bosch washer/dryer has recently lost it’s drying ability.

Model number is: WVD24520gb

Washing cycles are working fine but any time I start a drying cycle either gentle or intensive it comes to a stop after 5 or 6 minutes with a F17 error code.

I’ve done as the manual says for this code and can confirm water pressure is ok, hose not kinked and filters clear.

I’ve taken out the fan and removed any fluff build up.

I’ve also checked the water inlet valves with a multimeter and see the resistance for the valve relating to drying is reading 5.2kohms and the other two valves for washing are reading 3.6kohms. Is this the correct readings?

When i run a dry cycle I can see water going into the small white chamber for the first minute or so but then nothing. The fan is running ok and pump is draining.

Not sure where to go with this one and cannot afford the hefty charges for a Bosch technician just now