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Aftermarket Evaporators

Pay close attention when selecting and replacing evaporator cores. Sadly, many of the after market evaporators we see do not provide the same fit as their OEM counterparts.

In some instances we estimate the replacement part as roughly ten percent smaller than the original equipment core. The photo below shows that our replacement core is two rows narrower than the factory core.

This difference in size presents challenges for the technician during installation. Not only does he need to pay close attention to areas where air may pass around the core, inaccurate tube placement can cause grief while attempt is made to reseal the case. When we contacted distributors with questions regarding the difference in core size, they admit there are slight visual differences, but design and capacity is claimed to be equivalent to OEM. While we're not sure how true that statement is, we do know it's very important to check the fit of all replacement evaporators.

 Because of time constraints, we made no attempt to source a better fitting evaporator.  Instead we installed the smaller core.  We made a special rig so we could carefully bend the tubes and padded the core with additional foam so all air would pass through the cooling fins, with no chance of air passing around the core.  We were happy with performance after the job was completed.  Since ambient temperature was low at the time of installation, we'll have to wait for warmer days for the final verdict.  The customer on this job is an engineer, so, we fully expect to hear about any performace issues this smaller core may bring with it.

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