Can i make my heater make hotter air? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
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post #1 of 26 (permalink) Old 06-03-03, 06:57 AM Thread Starter
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Can i make my heater make hotter air?

Hi everyone

yep, i live in melbourne and the weather sucks. My heater, when on full heat seems only to blow warm air. My mates ford TX5 and a few other mates VL's there bloody heater when turnd on full like has much warmer air. Is there anyway to make my heater blow hotter air? I have a EA btw


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post #2 of 26 (permalink) Old 06-03-03, 08:14 AM
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Yep - drain the water from the raditor, then out only half of it back. lol.

Seriously, what % of anti-freeze/anti-boil are you using. Too much can reduce the temp the water gets to, thereby reducing the heat through your heater.

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post #3 of 26 (permalink) Old 06-03-03, 01:37 PM
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Dodgy thermostat will also cause this, partially blocked heater core, heater control valves, low coolant - lots of things.

I don't think the amount of anti-freeze has anything to do with it, antifreeze (and the pressure cap) just increase the boiling point of the coolant, the coolant will still absorb all the heat possible from the engine, it will just reach boiling point well above 212dF or whatever.

Although is is a known fact that straight water will absorb and dissipate heat quicker than an anti-freeze mix.

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post #4 of 26 (permalink) Old 06-03-03, 03:32 PM
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Well I have straight water in my car, and when the temp gauge gets to the bottom of the big bit in the middle (which is operating temp), it does the same thing, feels like warm air not hot air.

Coolant ratio makes no diff to the heater, I had a very high ratio of coolant in my XF and it always blew hot air without a problem.

I will buy some coolant this weekend and flush my radiator and heater, may get a new thermostat as well, and see how it goes, will post the results.

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post #5 of 26 (permalink) Old 06-03-03, 04:21 PM
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You can also put in a davies/craig booster pump that'll shoot more hot coolant into your heater core. I got one (havn't put in in yet) because my AU does the same but thats only because i've got a davies/craig water pump in as well running the engine temp very very cool.

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post #6 of 26 (permalink) Old 06-03-03, 09:33 PM
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You may want to check your thermostat, (to see if you even have one).

My XF used to run very cool, with no heater. I put a warmer thermostat in it, and fixed it right up.

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post #7 of 26 (permalink) Old 06-03-03, 09:56 PM
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what about the vacumn controlled heater valve?? is that looking rusty/corroded..it might not be opening up all the way...its located in the inlet hose going to the heater core..and has a green vacumn line going to it...

My XF has a new one..and the heater works 100%..

although id also do what others said and check/replace the thermostat too..

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post #8 of 26 (permalink) Old 06-03-03, 11:31 PM
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can;t offer anything constructive apart from saying i don't think it's an EA problem - my heater (used for the first time ever last week) blows hotter than hell - much better than my parent's AU Forte/NF Fairlane...

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post #9 of 26 (permalink) Old 06-04-03, 02:26 AM
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Thermostat and heater tap in the engine bay will be contributing factors. Flush ur system out with a good radiator flush, with the heater on. After 15mins of idling...turn the car off, drop the hose or drain valve, whichever, and replace thermostat with 92C if your having problems with hot air.
Make sure the heater tap vacuum hose isnt perished so it opens the tap all the way.

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post #10 of 26 (permalink) Old 06-04-03, 02:28 AM Thread Starter
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ok, i will try this on the weekend. I have a feeling it this could be one of the problems.

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