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1980 Eldo heater

Started by atime, November 03, 2016, 06:17:04 PM

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atime

I am having trouble with my heater. When I put the heat to 90 it blows out the bottom as it should but its cold not hot. The heater valve looks open and the hose is hot, any ideas what is going on?? thanks, Martin.

TJ Hopland

Maybe try backflushing the heater core?   Either age or stopleak at some point in its life could be partially blocking the flow through the core.

The air gets less warm if you lower the temp?   That would indicate that the blend door is working.
StPaul/Mpls, MN USA

73 Eldo convert w/FiTech EFI
80 Eldo Diesel
90 CDV
And other assorted stuff I keep buying for some reason