heater problem?
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Junior User
Joined: Sep 2003
Posts: 50
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heater problem?
I have a 87 bronco II V6. The A/C works great , bu tthe heater doesn't seem to get warm for a good 25 minutes. Also it seems like there isn't as much air coming out of the vents now. Any suggestions?
Mountain Pass
Joined: Sep 2003
Posts: 215
Likes: 2
From: San Diego
It sounds like a bad heater core. Ford recommends back-flushing the heater core independently of the main cooling system.
Connect a garden hose to the outlet hose of the heater core. Be sure there's no vacuum to a water valve if one is fitted. Disconnect the heater inlet hose to the engine block and allow to drain into a suitable receptacle. Turn the hose on and off several times to dislodge stubborn dirt then allow water to flow at full pressure for 5 minutes. If there's a water valve in the heater core inlet hose apply vacuum to ensure that this shuts off the water supply. You could also have a stuck water valve if there is indeed one fitted.
Connect a garden hose to the outlet hose of the heater core. Be sure there's no vacuum to a water valve if one is fitted. Disconnect the heater inlet hose to the engine block and allow to drain into a suitable receptacle. Turn the hose on and off several times to dislodge stubborn dirt then allow water to flow at full pressure for 5 minutes. If there's a water valve in the heater core inlet hose apply vacuum to ensure that this shuts off the water supply. You could also have a stuck water valve if there is indeed one fitted.
