Coparrotthead Posted July 22, 2017 Share Posted July 22, 2017 Just bought a 2004 Discovery SE and when I turn it off when it's hot the cooling fan continues to run even with the keys out. Is that normal? Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted July 22, 2017 Share Posted July 22, 2017 Not familiar with the particular model, but that is quite a common thing to happen. What does the user manual say? Quote Link to comment Share on other sites More sharing options...
Snagger Posted July 22, 2017 Share Posted July 22, 2017 Shouldn't that be a TD5 with a viscous fan? Aircon fans should only activate with elevated engine temperatures, so it's not normal for them to run on. Most electric fans will run with the ignition off as they are usually wired straight to the battery. 1 Quote Link to comment Share on other sites More sharing options...
teabag Posted July 22, 2017 Share Posted July 22, 2017 The ac fan running continually for a short while after switching off is normal IF the engine bay and cooling system has a high temperature. Usually happens with my disco on a very hot summers day, ac on plus the two exhaust manifolds makes for a very hot under bonnet situation after a drive. If the ac fan is on all the time while the engines running then the only way to cancel it is to plug the system in to to a diagnostic kit. 1 Quote Link to comment Share on other sites More sharing options...
sierrafery Posted July 23, 2017 Share Posted July 23, 2017 (edited) As said the electric fan on after the ignition is off it's normal but for an abnormal situation cos a Td5 with a well working cooling system should not exceed 110*C except in extreme situations, so you have a problem with the cooling system and your engine is running too hot(above 110*C) but as long as the gauge is at the middle it's below 120*C(the marvelous function of the original temp gauge), make sure you have enough coolant then try to stop the viscous fan with a rolled up newspaper when the radiator is hot, if you can you need a new one cos it's just freewheeling and that's why the engine gets too hot, if that's ok you better flush the system well then fill it with 50% OAT mix... we have above 38*C here and mine doesnt exceed 100*C(i have additional gauge) as long as everything is OK... that electric fan has dual purpose, for aircon and for cooling, see attachment Edited July 23, 2017 by sierrafery 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.