We have a 2003 Toyota 4Runner with the V8.

The temperature here has been below -20c many times so far this year. About a week ago my wife noticed that her 4runner is not warm inside when using her remote start. I drove this weekend and the remote starter works fine, engine temperature rises to normal running levels but the heater will not blow warm air until we enter the vehicle and step on the gas peddle. Once we do this the heat works just fine until the next time we cold start the vehicle. We have since topped up the antifreeze and this has not solved the problem.

Any assistance here would be appreciated.

  • @GdD OP says topping up the antifreeze has not solved the problem. Not sure what else in the question you might be referring to. – a CVn Feb 20 '18 at 9:00
  • I'd usually think weak vacuum isn't operating the blend door actuators, but the 4runner uses electric servos. – GdD Feb 20 '18 at 9:08
  • Does the car have an electric pump to circulate water to the heater matrix? If so, maybe this pump is not working anymore. – HandyHowie Feb 20 '18 at 11:47
  • @HandyHowie if the pump wasn't working I would not expect to have any heat, yet they say it works fine once the idle has been bumped up. – Christopher Hunter Mar 1 '18 at 23:45
  • @ChristopherHunter The electric pump is often for the times when the mechanical pump isn't providing enough circulation like at idle. Once the mechanical pump is running at normal speed, there is enough circulation to keep the heater working. – HandyHowie Mar 2 '18 at 8:04

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