HOTPOINT AQUARIUS TDC30S CONDENSER DRYER IS WORKING BUT NOT GETTING HOT TO DRY & RED LIGHT STAYS ON WHEN FILTER IS CLEANED BUT IT STILL WORKS APART FROM THEM PROBLEMS
Sounds like the front duct stat has failed which cuts the feed to the heater and puts the filter light on. Should be able to buy one from a local Hotpoint dealer,only a few quid. Also check stats on heater at the rear for continuity. If open circuit replace as well.
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Try fixfault.com to fix tumble dryers.