Thermal module for a sample processing assembly

A method of warming a sample, the method comprising:

• warming the sample on a substrate in a sample processing assembly by controllably altering a temperature within a reaction chamber,
• wherein the reaction chamber is bounded by a substrate and cover member in the sample processing assembly,
• wherein the sample processing assembly comprises:
• a thermal generator for generating temperature changes;
• a transfer layer configured to transfer temperature changes away from the thermal generator and towards a closure body;
• and
• the closure body which is attached to the transfer layer and is configured to pivot around the transfer layer and to form the reaction chamber by inner portions of the closure body fitting to portions of the transfer layer facing away from the thermal generator.