[TR] TR 250 Heater problem

[DAVID MASSEY]

 Two things come to mind.  

1) Air is bypassing the core on that side.  It has been years since I took one apart.  Is there a foam piece sealing off the gap between the core and the sheetmetal housing that has perished?
2) The core is partially clogged.  Certainly there is some flow but some tubes may be clogged leaving a portion of the core cool and, hence, the air is not heated.  (Actually, I have a little difficulty with this one since the tubes run right-to-left and if there were clogged tubes the problem would be symmetrical.  But still worth looking into it.)
 
Dave 

 
 
-----Original Message-----
From: Roger Elliott <elliottr at rmi.net>
To: triumphs <triumphs at autox.team.net>
Sent: Wed, Dec 19, 2018 5:13 pm
Subject: [TR] TR 250 Heater problem

Hi,

We were out in my wife's TR 250 the other night and the heater was 
acting up on the passenger side.

The defroster vent seemed to be hot on the right side of the passenger 
vent, but cold on the left side (the driver's defroster vent was fine.)

The air from the floor vent on the passenger side was cold, the driver's 
side was fine - at least until a coat was shoved under the passenger 
side which then diverted the cold to the driver's side.

We took out the glove box and all of the hoses are hooked up correctly.

I can't think of anything that would allow the air coming from the 
defroster vent be cold on one side and hot (well okay warm) on the other 
side. The only thing I can think of is that the seal around the heater 
core is letting cold air past on the passenger side.

Any ideas?

Thanks,
Roger Elliott


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