![]() Clean the plenum, and check for sealing problems to prevent occurrence. If the drains are plugged, such as by leaves returning back to soil, or seeds, or ?, the level will get higher and allow water to overflow 'the dam'. Normally, a reverse gutter(to keep water out), like a wall, will allow air in, but the water level would have to be high(normally) to flow over and gain entry. The resistor pack problem is caused by water entry into the passenger compartment, likely from the plenum at the base of the windshield. The parts in question are difficult-to-impossible to clean effectively, thus leading to the need to replace just about everything under the hood in the A/C system. ![]() The bag holding the desiccant beads fails, and the beads migrate through the system, causing blockage and failure. The former is inside the A/C sealed refrigerant system, and rain cannot(should not) be able to get in there. The accumulator problem with desiccant bags deteriorating has nothing to do with water on the resistor pack. Has anyone else here heard about or experienced these issues? Are TSBs listed somewhere on EC? Can someone in Ford service weigh in, or can someone on EC point out where the TSBs are listed, thanks! This had all the tones of "we see you coming". If I understood, the shield also protects the accumulator. This leads to decay of AC effectiveness, and may damage some parts. The moisture can also cause failure of the membrane in the AC accumulator, allowing desiccant to enter the refrigerant. (7 years on EC and 2 years in the fb groups, and I've never heard of this before today). The TSB, if I do it, will cost me CAD$250 for parts + labour. The fix includes installing a shield over the resistor. rust or a green deposit, on the resistor. If this happens there can be discolouration, i.e. Something above the resistor (or in the duct?) can leak water (or moisture) onto it and cause premature failure. The chat from the parts guy was interesting:Īpparently there is a TSB on this problem. ![]() The resistor price is only slightly higher. Thought I was a pro at changing the blower resistor, but wondered if the second failure in 2017 was bcs of an after-market part, so went to the dealer this time. REPLACE OEM PART NUMBER: This Ford Fan Resistor is for Manual AC Controls, direct replace your original blower motor resistor YH1715,3F2Z18591AA,973-444,RU-440.
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