When making colour prints for the first time for a few months (using fresh and unopened chemistry), I noticed the prints were appearing pale and balanced towards green-blue. Increasing development time to 120 seconds increased density as expected with a slight warm shift but demonstrated the developer and bleach fix were / are working correctly. However, on measuring the temperature of both the developer and bleach fix baths, approx. 20ºC was found in several instances over two darkroom sessions. The pumps for both baths were checked with plain water in-situ and are working. The Thermaphot manual refers to 'heat exchangers' apparently used to 'save chemisty' however, I'm not entirely clear what the role of these are in this unit; i.e. whether they perform a heating function in this instance. The manual doesn't explain the logic or concept of the machine's operation. As the Thermaphot ACP 505 operates a valve control for the three print washing baths which is apparently closed when no print is going through; it would seem difficult for the "chemical" baths to maintain a constant 35ºC. The first image shows the two metal bars, connected to these are solution lines running from one side of each dev & bleach fix tank, through the metal tubes to separate pumps for each line and then back into the other side of the tanks. The off-white goo on the floor of the unit doesn't look as though it should be there and so may be related to the issue; however the could also be an issue with the control circuitry. Tempered wash water is provided by an external Intellifaucet. I have been using the unit for processing B&W RC prints since the new year; prior adjustment of the controls could mean the baths have never (or not for a while) been at 35ºC / 38ºC. When I first started using the machine in autumn 2008 an amber LED would be lit until the temperature had apparently reached that indicated on the dial (e.g. 35ºC), however this LED stopped operating at some point earlier this year; I forgot to make a note of the date. Tom.