take the glovebox out, 4 t20 screws i think adn the heater blower is at the back on the left, have a rummage around there check the filter at the same time. this might help showthread.php?120853-Oil-and-filters-change-Astra-H The purpose of the elements in the blocks of your Opel Astra H may differ from that shown and depends on the year of manufacture, the country of delivery and the level of electronic equipment. 30А Independent heater IH 100А Additional heater - electric, passenger compartment EH: FB5: 80A at REC / Rear Fuse Box: FB6: 80A at REC / Rear Fuse Diagnostic trouble code (DTC) P0597 code stands for "Thermostat Heater Control Circuit/Open." The PCM will log this code once it detects that the thermostat signal gives out incorrect voltage readings for a specific amount of time. The P0597, in particular, warns that the electronic valve's control voltage is zero. 3077 posts · Joined 2016. #2 · Jul 18, 2016. First thing to have checked and confirmed is that it has gas in it, and the correct amount of gas too. If it has leaked to any major level, needs to be checked where the leak has occurred - quite often the condenser in front of the engine's radiator gets either punctured or corrodes and leaks the redman. Quite a common problem on the astra. The engine coolant thermostat has an electrical heater element embedded in the housing. It has developed a fault and the most likely remedy is a genuine Vauxhall replacement thermostat. It should be ok to drive until replaced as the stat is a fail safe type, should the heater element stop working.. When all of the gauges or warning lights in your car stop working at once, the problem is something that all of the gauges and lights share in common. Check the fuses first. The fuse may be labeled gauges, clusters, or something similar. This fuse should have power on both sides with the ignition in the on position. fVvfVO.

opel astra heater not working