Heater not hot hot

[krishen 2]

Hi,

 

I had the radiator replaced a couple of months ago and since then noticed the heater is not as hot as it used to be. If i was getting 10/10 heat before its more like 7/10 heat now.

 

Could air in the system cause this?

[1xshaunx1 27]

The system bleeds itself easily normally,a short run and a top up after usually does it. How quickly does it achieve this heat. If it takes forever and struggling to reach temps could be thermostat stuck open.

[Supercharged 2]

Do you have the recall bypass valves still fitted?

[krishen 2]

The system bleeds itself easily normally,a short run and a top up after usually does it. How quickly does it achieve this heat. If it takes forever and struggling to reach temps could be thermostat stuck open.

 

Doesn't take long, maybe 5-10 mins to get warm air and then hot air follows very soon after.

 

Do you have the recall bypass valves still fitted?

 

No idea. Will have to check. But can they cause heat temp to drop if they start to fail?

[seanl82 23]

What year is your car? The bypass valves we're only fitted to early cars. You can tell if it's had the recall by the fact that one is metal and one is plastic. Does the air get cooler when driving then warm up again when stationary? That's the indication that the stat is stuck open. Worth bleeding properly if you think there might be air in the system though. They're notorious for being difficult to bleed. Just run the engine up from cold with the expansion cap off, alternating revs up to 2.5k then idle for 30 secs each. When idling, massage the pipes to force air to the top. When temp reaches 90, switch off, let it cool the top up as necessary.