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How bypass a rear heater core on 2003 mazda mpv

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Check the recall and have it replace free of sure

Posted on Apr 08, 2015

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Bsm240's related answer is short & to-the-point

find somewhere along those 2 heater core hoses where you can put a "heater hose union" and 2 clamps

i prefer a metal/brass one over a plastic one, just for longevity

or depending on your situation, you can just buy a hose and 2 clamps to connect the metal lines to each other

ps: there was a recall about this

MPVClub com View topic Dealer words Recall for Rear Heater Pipe coming

read the 14 page thread about all the owners having the same problems with this rear heater core problem

Posted on Apr 08, 2015


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Posted on Jan 02, 2017

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SOURCE: cold air coming from rear vent of 2000 mazda mpv

Your ventilation shutter is not closing properly.

Posted on Nov 17, 2008

  • 7 Answers

SOURCE: 2004 mazda mpv- rear heater fan only works on high

My bet is that there's a relay at fault... but first: have you checked the fuses? the high blower speed draws a lot of power, so sometimes it's fused separately from the other speeds. This means that your fuse for the slow blower speeds could be blown. Also, because theblower draws so much power, you'd need a HUGE switch to switch it directly, so they use a low-power switch inside the car, and a relay (usually under the hood, but sometimes under a seat (check your owner's manual) to do the heavy work. These are often split the same way, with the high blower on one, and the slow on the other. These are the things that are easier to check, but it could just be that the switch is bad. Mid 90s Land rovers and Range Rovers have the same problem, where the only blower speed that works is HIGH, making the cabin sound like a wind tunnel... Just the switch. The switch can be a pain to replace if you do it yourself, but do check the fuses first, and see if you can find the relays. if the fuses are okay, and you find the relays, try to find the one that's for the fan and swap it out, it shouldn't be more than 3-4 dollars from an auto parts store, just bring in the old one to match it, or swap it for another relay that's nearby and has the same pins. If the swap works, just remember to get another relay, because the one you "borrow" from another circuit could be the door locks or the headlights or something else important....

Posted on Jun 22, 2009

  • 25 Answers

SOURCE: A 1999 Kia Sportage. Heater core leaking.

tie both hoses together

Posted on Jun 25, 2009

  • 740 Answers

SOURCE: no heat inside van


Posted on Jan 21, 2010

  • 1627 Answers

SOURCE: My 2000 Mazda MPV heater fan works for 4 not for 1

You need to replace the blower motor resistor,it's in the heater box.Number 4 bypasses the resistor and all the other speeds go through it so it's the most likely problem.

Posted on Feb 19, 2010

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