Question about 1990 Honda Accord

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1990 honda accord temp gauge above hot limit.

1990 honda accord lx.

Temp. Gauge reads over last red bar. Engine runs fine... This happens after one minute after starting engine. New temp. sensor.and had a radiator flush. water pump is working as well as the thermostat.

Do i need a new instrumental cluster? or is there another relay or sensor that sends the info to the gauge that i can replace.

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  • wired_ants Jan 27, 2010

    yeah i did all of that... except for the cooling system "pressure tested" thing... No leaks at all... everything is stock.

    My gut is leaning more towards that somehow the gauge is reading something wrong... or the gauge itself has gone bad.

  • Anonymous Mar 22, 2014

    Is there more than one temp switch on a 1990 honda accord and if so where are both located

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  • 720 Answers

Hi there,

Firstly - DO NOT run engine, when guage reads hot, as this will cause costly damage to head gasket & alloy engine head.

The fact that guage takes 1min to read HOT, would confirm the guage IS working properly.

So, other components which are likely to cause hot readings (in this order) are:

- lack of coolant (or leakage somewhere): is there sufficient green coolant at the correct level? Top up mixture to correct level. Repair any leaks.

- collapsed radiator hose: when engine is cold, start engine, then quickly watch both upper & lower radiator hoses to see if either begins to flex inwards (collapse). Replace if either hose is collapsed.

- bad/incorrect thermostat rating : when replacing thermostats, you must ensure it is of the SAME temp rating (they all differ).

- Incorrect Temp sensor rating: the ratings of this sensor must be within manufacturer's spec's.

- bad waterpump: the engine relies on the waterpump to distribute the coolant throughout the entire system. If waterpump is faulty, coolant will not flow quick enough, causing overheating.

If you still believe all of the above components are OK, then have your cooling system "pressure tested". This test should be done, before looking further at other electrical components.

Cheers,

"if this has helped you in any way, please rate this solution"

Posted on Jan 27, 2010

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