When the engine is up to temperature see if you have one boiling hot pipe going to the heater at the bulkhead and one cold pipe. If you do then the matrix is blocked. If they are both hot then it points to an air distribution fault within the heater itself. Diagnostic equipment - latest OpCom Advanced 210420b Professional.
Service Engine Soon – Other than the heater not working, the only other symptom of P0128 is typically the service engine soon light itself. Slight Decrease in fuel economy – The P0128 code may also lead to a slight decrease in fuel economy. This is because your Astra’s engine is running at a cooler temperature than it should be.
It should only prevent it working on the slowest speed. See the pic below. By the way, Vauxhalls generally use Brown cable as the earth/neutral and have been for at least since the Mk2 Astra. Black normally means something else. If you connect it back up as normal it should work on every speed bar the slowest speed.
gashy. 581 posts · Joined 2006. #2 · May 13, 2017. It should be located behind the glove box on the right hand side next to the centre console. And held in by 2 torxs bolts. Look for 2 cables coming off the motor itself going into the resistor. If your handy with a soldering iron then pay around £1 for the resistor itself and solder it onto Note: Replace blower motor if required. Dry heater housing inner side. - see working procedure "Blower Motor Replacement — Right Hand Drive", group "HVAC/Heating, Ventilation, and Air Conditioning", Service Instruction Astra-J (Document Number 92293574) 3. Remove blower motor control module and check for water traces
Remove the windscreen wipers. Remove the scuttle panel. Remove the pollen filter by releasing the 2 retaining clips. Undo the 2 retaining screws holding the resistor pack in place. Now fit the new resistor pack, and replace everything in reverse order. That should cure your heater problems.
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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 http://www.astraownersnetwork.co.uk/showthread.php?120853-Oil-and-filters-change-Astra-H
2515 posts · Joined 2015. #3 · Dec 20, 2019. I believe it's a common problem. Vauxhall changed the connectors under the seat for this reason. Sure there is a Technical service bulletin about it. Long time Vauxhall owner (well from 1986 anyway - lol). Currently driving an Astra-J 2.0 diesel auto.
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These are the Vauxhall Opel Astra K common problems and issues. It can serve as a buyers guide if you are looking to see what issues owners are having with t
